This document provides information about a science project submitted by Aditya Sha of class 10th. It discusses various topics related to chemical reactions including word equations, balanced chemical equations, types of chemical reactions, and signs of chemical reactions. It also covers corrosion, rancidity, and their causes and effects. The document recognizes several teachers and parents who provided support for the project.
Class 10 l Science l Chemistry l Lesson 1: Chemical equations and reactionsMoulyaT
A chemical reaction involves one or more reactants forming new products with different properties. Chemical equations represent reactions symbolically, with balanced equations showing equal numbers of atoms on both sides. There are several types of reactions including combination, decomposition, exothermic/endothermic, displacement, neutralization, and oxidation-reduction. Identification of a reaction can occur through changes in state, color, gas evolution, temperature change, or precipitate formation.
1. Chemical reactions involve chemical changes that result in the formation of new substances.
2. Chemical equations are used to represent chemical reactions, with reactants on the left side of the arrow and products on the right. These equations must be balanced and follow the law of conservation of mass.
3. There are several types of chemical reactions including combination, decomposition, displacement, and oxidation-reduction. Combination reactions involve elements or compounds reacting to form a single product, while decomposition reactions involve a single reactant breaking down into simpler products.
Chemical reactions involve the rearrangement of atoms and the formation of new substances. There are several types of chemical reactions including combination, decomposition, single displacement, double displacement, and redox reactions. Balanced chemical equations are used to represent these reactions and must satisfy the law of conservation of mass.
Different types of chemical reactions(ppt)utkarshs92
Utkarsh Singh presented on the different types of chemical reactions. There are several types including combination reactions, decomposition reactions, displacement reactions, and double displacement reactions. Combination reactions involve elements or compounds combining to form a new substance. Decomposition reactions involve breaking a substance down into simpler substances. Displacement reactions involve one element replacing another in a compound. Double displacement reactions involve ion exchange between two ionic compounds. Oxidation-reduction reactions involve the transfer of electrons between reactants. Exothermic reactions release heat while endothermic reactions absorb heat from their surroundings.
This document discusses a science presentation about the properties and reactions of metals and non-metals. It lists the group members giving the presentation and describes several properties of metals like malleability and conductivity. It then discusses how metals react with oxygen, water, acids, salt solutions, chlorine, hydrogen and how alloys are formed and used. For non-metals, it summarizes their reactions with oxygen, water, acids, salt solutions, chlorine, hydrogen and describes ionic compounds.
Chemical reactions involve the rearrangement of atoms when substances undergo chemical changes. There are several signs that indicate a chemical reaction has occurred, such as a change in color, gas evolution, temperature change, state change, or precipitate formation. Chemical reactions can be described by word equations or chemical equations, with the latter providing a more concise representation where the reactants are on the left and products on the right, separated by an arrow. Chemical equations must satisfy the law of conservation of mass and show correct formulas and phases for substances. Balanced chemical equations ensure equal numbers of each type of atom are present on both sides. Common types of chemical reactions include combination, decomposition, displacement, and redox reactions.
Chemical reactions and equations class 10SnehaTaliyan1
The document discusses various physical and chemical changes that occur in everyday life. It provides examples of physical changes such as changes in state from liquid to gas, and chemical changes where new substances are formed. The key differences between physical and chemical changes are explained, with chemical changes resulting in the formation of new substances with different properties compared to the original reactants. Specific chemical reactions and observations that indicate chemical changes, such as gas evolution, temperature change, and color change, are also outlined.
This document outlines key concepts about acids, bases, and salts. It defines acids as substances that produce hydrogen ions in water. There are strong acids that fully ionize and weak acids that partially ionize. Bases are oxides or hydroxides of metals. Alkalis are soluble bases that produce hydroxide ions in water. Acids and bases react to form salts and water in a neutralization reaction. The pH scale measures acidity and alkalinity. Indicators change color with pH. There are four types of oxides. Salts contain cations from bases and anions from acids. Common salts have various industrial and domestic uses.
Class 10 l Science l Chemistry l Lesson 1: Chemical equations and reactionsMoulyaT
A chemical reaction involves one or more reactants forming new products with different properties. Chemical equations represent reactions symbolically, with balanced equations showing equal numbers of atoms on both sides. There are several types of reactions including combination, decomposition, exothermic/endothermic, displacement, neutralization, and oxidation-reduction. Identification of a reaction can occur through changes in state, color, gas evolution, temperature change, or precipitate formation.
1. Chemical reactions involve chemical changes that result in the formation of new substances.
2. Chemical equations are used to represent chemical reactions, with reactants on the left side of the arrow and products on the right. These equations must be balanced and follow the law of conservation of mass.
3. There are several types of chemical reactions including combination, decomposition, displacement, and oxidation-reduction. Combination reactions involve elements or compounds reacting to form a single product, while decomposition reactions involve a single reactant breaking down into simpler products.
Chemical reactions involve the rearrangement of atoms and the formation of new substances. There are several types of chemical reactions including combination, decomposition, single displacement, double displacement, and redox reactions. Balanced chemical equations are used to represent these reactions and must satisfy the law of conservation of mass.
Different types of chemical reactions(ppt)utkarshs92
Utkarsh Singh presented on the different types of chemical reactions. There are several types including combination reactions, decomposition reactions, displacement reactions, and double displacement reactions. Combination reactions involve elements or compounds combining to form a new substance. Decomposition reactions involve breaking a substance down into simpler substances. Displacement reactions involve one element replacing another in a compound. Double displacement reactions involve ion exchange between two ionic compounds. Oxidation-reduction reactions involve the transfer of electrons between reactants. Exothermic reactions release heat while endothermic reactions absorb heat from their surroundings.
This document discusses a science presentation about the properties and reactions of metals and non-metals. It lists the group members giving the presentation and describes several properties of metals like malleability and conductivity. It then discusses how metals react with oxygen, water, acids, salt solutions, chlorine, hydrogen and how alloys are formed and used. For non-metals, it summarizes their reactions with oxygen, water, acids, salt solutions, chlorine, hydrogen and describes ionic compounds.
Chemical reactions involve the rearrangement of atoms when substances undergo chemical changes. There are several signs that indicate a chemical reaction has occurred, such as a change in color, gas evolution, temperature change, state change, or precipitate formation. Chemical reactions can be described by word equations or chemical equations, with the latter providing a more concise representation where the reactants are on the left and products on the right, separated by an arrow. Chemical equations must satisfy the law of conservation of mass and show correct formulas and phases for substances. Balanced chemical equations ensure equal numbers of each type of atom are present on both sides. Common types of chemical reactions include combination, decomposition, displacement, and redox reactions.
Chemical reactions and equations class 10SnehaTaliyan1
The document discusses various physical and chemical changes that occur in everyday life. It provides examples of physical changes such as changes in state from liquid to gas, and chemical changes where new substances are formed. The key differences between physical and chemical changes are explained, with chemical changes resulting in the formation of new substances with different properties compared to the original reactants. Specific chemical reactions and observations that indicate chemical changes, such as gas evolution, temperature change, and color change, are also outlined.
This document outlines key concepts about acids, bases, and salts. It defines acids as substances that produce hydrogen ions in water. There are strong acids that fully ionize and weak acids that partially ionize. Bases are oxides or hydroxides of metals. Alkalis are soluble bases that produce hydroxide ions in water. Acids and bases react to form salts and water in a neutralization reaction. The pH scale measures acidity and alkalinity. Indicators change color with pH. There are four types of oxides. Salts contain cations from bases and anions from acids. Common salts have various industrial and domestic uses.
This document provides an overview of chemical reactions and equations. It discusses chemical changes and how they can be represented by balanced chemical equations. The main types of chemical reactions covered are combination reactions, decomposition reactions, displacement reactions, and oxidation-reduction reactions. Examples of each type of reaction are given. The document also explains how to balance chemical equations by ensuring equal numbers of each type of atom on both sides of the reaction equation.
This document discusses chemical reactions and properties of matter. It defines physical and chemical properties, and explains that a chemical change produces new substances while a physical change does not. It also outlines how to identify chemical reactions through observation of properties like color change, gas production, or precipitate formation. The document then explains how to write and balance chemical equations, and categorizes three main types of chemical reactions: synthesis, decomposition, and replacement. Finally, it discusses factors that affect the rate of chemical reactions like surface area, temperature, concentration, and catalysts.
The document provides information about grade 10 IGCSE chemistry content related to properties and reactions of metals. It discusses distinguishing metals from non-metals, reactivity series, extraction of metals like iron from ores, and uses of metals such as aluminum and zinc. It also describes physical and chemical properties of metals, structure and properties of alloys, and reactions of metals with water, steam, and acids to determine reactivity order.
The document discusses the reactivity series of metals and how it is determined. The reactivity of a metal is based on its tendency to lose electrons and form positive ions. Experiments are conducted to see which metals react with water, acids, carbon, other metals, and metal ion solutions. These experiments allow metals to be ranked in a reactivity series from most reactive to least reactive. The reactivity series can then be used to predict and understand redox reactions between metals.
Carbon is a versatile element that forms millions of compounds. It exists in many forms including diamond and graphite. Carbon is present in all living organisms and is the main component of fuels like coal.
Carbon atoms bond with other atoms through covalent bonds by sharing electrons. This allows carbon to form chains, branches and closed rings. Hydrocarbons contain only carbon and hydrogen and can be saturated or unsaturated. Functional groups determine the properties of carbon compounds.
Some important carbon compounds are ethanol, ethanoic acid, and soaps. Ethanol is used in drinks and medicines while ethanoic acid gives vinegar its sour taste. Soaps clean through micelle formation while detergents work better in
The document provides information about various chemistry concepts related to air and water:
- It describes chemical tests to identify water and the purification of water supplies through filtration and chlorination.
- The composition of clean air is described as 78% nitrogen, 21% oxygen and small quantities of other gases. Common air pollutants like carbon monoxide and their sources are stated.
- Fractional distillation is outlined as the process used to separate oxygen and nitrogen from liquid air based on their different boiling points.
- Rusting is described as a reaction between iron, air and water that can be prevented by methods like painting and galvanizing to exclude oxygen.
condition for the chemical change ICSE class 9tabishkamran
in this module will discuss about the condition for the chemical change . what are the factors are responsible for the chemical change. and idea of catalyst
complete overview of chemical reactions along with their types.
it contains
chemical reaction and equation
types of chemical reaction (5 types)
corrosion
rancidity
The document discusses the properties of metals and non-metals. Metals typically conduct heat and electricity well, have high melting points, and can be molded. Non-metals are usually poor conductors that exist as solids or gases, are not malleable, and have low melting points. A third category of elements called metalloids have properties of both metals and non-metals. While there are some exceptions, metals tend to be good conductors of heat and electricity with high densities, while non-metals are typically brittle insulators with low densities.
Chemical reaction and equation class xNeetu Bansal
This document discusses various topics related to chemical reactions including: types of chemical reactions like combination, decomposition, displacement, and redox reactions; oxidation and reduction; corrosion; and rancidity. It provides examples and definitions for key concepts. Balancing chemical equations and identifying oxidizing/reducing agents and substances that are oxidized/reduced in reactions are also covered.
This document provides information on chemical reactions and equations. It defines a chemical reaction as a process that transforms one set of substances into another. It explains the different types of chemical equations like word equations, skeletal equations, and balanced equations. It also describes the different types of chemical reactions such as combination, decomposition, displacement, and redox reactions. It discusses oxidation and reduction processes and defines oxidizing and reducing agents. Examples of chemical equations are also provided.
This document discusses electrolysis, which is the process of using direct current to cause non-spontaneous chemical reactions. Electrolysis requires an electrolyte containing free ions, a direct current power supply, and two electrodes. During electrolysis, ions are oxidized or reduced at the electrodes through electron transfer. As an example, electrolysis can be used to purify copper by dissolving impure copper and conducting electrolysis, depositing pure copper at the cathode. Electrolysis equations describe the half-reactions that occur at each electrode. The document also provides an example of electrolyzing brine to produce chlorine gas, hydrogen gas, and sodium hydroxide.
This document outlines the 5 main types of chemical reactions:
1) Synthesis reactions involve combining two or more substances to form a single product.
2) Decomposition reactions involve a single reactant breaking down into multiple products.
3) Single replacement reactions involve one element replacing another in a compound.
4) Double replacement reactions involve ion exchange between two compounds in solution.
5) Combustion reactions involve oxidation, producing energy, carbon dioxide, and water when oxygen reacts with a fuel.
Class 10 Chemistry Chapter 1 chemical reactions and equationsNandananPr1
This document defines key concepts related to chemical reactions including:
- A chemical reaction involves substances (reactants) reacting to form new substances (products) through chemical change.
- Chemical equations represent reactions using symbols and formulas, and balanced equations have equal numbers of each element on both sides.
- Common types of reactions include combination, decomposition, displacement, double displacement, precipitation, oxidation, and reduction reactions.
- Exothermic reactions release heat while endothermic reactions absorb heat. Corrosion involves metals deteriorating due to air, moisture or chemicals, while rancidity is the oxidation of oils and fats.
Science ppt 10th class chemical reactions by JeyasuriyaJeyasuriya1999
This PowerPoint presentation covers chemical reactions. It begins by defining physical and chemical changes, and examples of each. It then discusses what a chemical reaction is at a molecular level. The presentation shows examples and animations of chemical reactions to aid understanding. It identifies and explains the main types of chemical reactions: combination, decomposition, displacement, double displacement, oxidation, reduction, redox, endothermic and exothermic reactions. Specific examples are provided for each type of reaction. The presentation concludes by thanking the teachers and classmates for their attention.
CBSE Class 11 Chemistry Chapter 1 (Some Basic Concepts of Chemistry) | Homi I...Homi Institute
Chemistry is the scientific study of the structure of substances and how they change under different conditions or when mixed together. It involves studying molecules and how they combine in fixed ratios according to scientific laws like the law of conservation of mass, the law of definite proportions, and the law of multiple proportions. The average atomic mass of an element takes into account the relative abundance of its different isotopes.
Chemical reactions and equations class 10 CBSEritik
This document discusses chemical reactions and equations. It defines a chemical reaction as a process where reactants are converted into products, which may occur under the influence of a catalyst. It describes how to write chemical equations and balance them by ensuring equal numbers of each type of atom on both sides of the reaction. It also defines and provides examples of different types of chemical reactions: combination, decomposition, displacement, double displacement, and redox reactions. Corrosion and rancidity are discussed as examples of oxidation reactions.
This document discusses the classification and properties of elements as either metals or non-metals. Metals have properties such as sonority, high melting and boiling points, corrosion, and reactions with water and acids to form salts and hydrogen gas. Non-metals tend to have opposite properties, such as low density and melting/boiling points, no corrosion or reaction with water, and limited reactivity with acids. The key differences between metals and non-metals are outlined for several important physical and chemical properties.
Topics Included
• Introduction
• Metals
→ Physical properties of metals
→ Chemical Properties of metals
• Non-metals
→ Physical properties of non-metals
→ Chemical Properties of metals
• Difference between metals and non-metals
• Reaction with Acids
• Reaction with Bases
This document discusses chemical reactions and equations. It begins by defining chemical changes and explaining how they can be identified. It then discusses how chemical reactions are represented through word equations and chemical equations. Chemical equations show the reactants on the left and products on the right, with an arrow indicating the direction of change. Balanced chemical equations ensure the total mass and number of atoms are equal on both sides. The document also describes different types of chemical reactions like combination, decomposition, displacement, and oxidation-reduction reactions. It provides examples of each type and explains key concepts like oxidizing agents and reducing agents. Finally, it discusses applications of chemical reactions like corrosion and rancidity.
Chemical Reaction And Equations
1. A chemical reaction is a process where reactants are converted into products. An equation is a symbolic representation of a reaction.
2. Key parts of a chemical equation include reactants on the left side of the arrow, products on the right side, and coefficients that indicate mole ratios.
3. There are several types of chemical reactions including combination, decomposition, displacement, and double displacement. Oxidation-reduction reactions involve the transfer of electrons between reactants.
An attempt to make the description of chemical reactions a mini-story. Not the best story by any means, but it was pretty well received by the students.
This document provides an overview of chemical reactions and equations. It discusses chemical changes and how they can be represented by balanced chemical equations. The main types of chemical reactions covered are combination reactions, decomposition reactions, displacement reactions, and oxidation-reduction reactions. Examples of each type of reaction are given. The document also explains how to balance chemical equations by ensuring equal numbers of each type of atom on both sides of the reaction equation.
This document discusses chemical reactions and properties of matter. It defines physical and chemical properties, and explains that a chemical change produces new substances while a physical change does not. It also outlines how to identify chemical reactions through observation of properties like color change, gas production, or precipitate formation. The document then explains how to write and balance chemical equations, and categorizes three main types of chemical reactions: synthesis, decomposition, and replacement. Finally, it discusses factors that affect the rate of chemical reactions like surface area, temperature, concentration, and catalysts.
The document provides information about grade 10 IGCSE chemistry content related to properties and reactions of metals. It discusses distinguishing metals from non-metals, reactivity series, extraction of metals like iron from ores, and uses of metals such as aluminum and zinc. It also describes physical and chemical properties of metals, structure and properties of alloys, and reactions of metals with water, steam, and acids to determine reactivity order.
The document discusses the reactivity series of metals and how it is determined. The reactivity of a metal is based on its tendency to lose electrons and form positive ions. Experiments are conducted to see which metals react with water, acids, carbon, other metals, and metal ion solutions. These experiments allow metals to be ranked in a reactivity series from most reactive to least reactive. The reactivity series can then be used to predict and understand redox reactions between metals.
Carbon is a versatile element that forms millions of compounds. It exists in many forms including diamond and graphite. Carbon is present in all living organisms and is the main component of fuels like coal.
Carbon atoms bond with other atoms through covalent bonds by sharing electrons. This allows carbon to form chains, branches and closed rings. Hydrocarbons contain only carbon and hydrogen and can be saturated or unsaturated. Functional groups determine the properties of carbon compounds.
Some important carbon compounds are ethanol, ethanoic acid, and soaps. Ethanol is used in drinks and medicines while ethanoic acid gives vinegar its sour taste. Soaps clean through micelle formation while detergents work better in
The document provides information about various chemistry concepts related to air and water:
- It describes chemical tests to identify water and the purification of water supplies through filtration and chlorination.
- The composition of clean air is described as 78% nitrogen, 21% oxygen and small quantities of other gases. Common air pollutants like carbon monoxide and their sources are stated.
- Fractional distillation is outlined as the process used to separate oxygen and nitrogen from liquid air based on their different boiling points.
- Rusting is described as a reaction between iron, air and water that can be prevented by methods like painting and galvanizing to exclude oxygen.
condition for the chemical change ICSE class 9tabishkamran
in this module will discuss about the condition for the chemical change . what are the factors are responsible for the chemical change. and idea of catalyst
complete overview of chemical reactions along with their types.
it contains
chemical reaction and equation
types of chemical reaction (5 types)
corrosion
rancidity
The document discusses the properties of metals and non-metals. Metals typically conduct heat and electricity well, have high melting points, and can be molded. Non-metals are usually poor conductors that exist as solids or gases, are not malleable, and have low melting points. A third category of elements called metalloids have properties of both metals and non-metals. While there are some exceptions, metals tend to be good conductors of heat and electricity with high densities, while non-metals are typically brittle insulators with low densities.
Chemical reaction and equation class xNeetu Bansal
This document discusses various topics related to chemical reactions including: types of chemical reactions like combination, decomposition, displacement, and redox reactions; oxidation and reduction; corrosion; and rancidity. It provides examples and definitions for key concepts. Balancing chemical equations and identifying oxidizing/reducing agents and substances that are oxidized/reduced in reactions are also covered.
This document provides information on chemical reactions and equations. It defines a chemical reaction as a process that transforms one set of substances into another. It explains the different types of chemical equations like word equations, skeletal equations, and balanced equations. It also describes the different types of chemical reactions such as combination, decomposition, displacement, and redox reactions. It discusses oxidation and reduction processes and defines oxidizing and reducing agents. Examples of chemical equations are also provided.
This document discusses electrolysis, which is the process of using direct current to cause non-spontaneous chemical reactions. Electrolysis requires an electrolyte containing free ions, a direct current power supply, and two electrodes. During electrolysis, ions are oxidized or reduced at the electrodes through electron transfer. As an example, electrolysis can be used to purify copper by dissolving impure copper and conducting electrolysis, depositing pure copper at the cathode. Electrolysis equations describe the half-reactions that occur at each electrode. The document also provides an example of electrolyzing brine to produce chlorine gas, hydrogen gas, and sodium hydroxide.
This document outlines the 5 main types of chemical reactions:
1) Synthesis reactions involve combining two or more substances to form a single product.
2) Decomposition reactions involve a single reactant breaking down into multiple products.
3) Single replacement reactions involve one element replacing another in a compound.
4) Double replacement reactions involve ion exchange between two compounds in solution.
5) Combustion reactions involve oxidation, producing energy, carbon dioxide, and water when oxygen reacts with a fuel.
Class 10 Chemistry Chapter 1 chemical reactions and equationsNandananPr1
This document defines key concepts related to chemical reactions including:
- A chemical reaction involves substances (reactants) reacting to form new substances (products) through chemical change.
- Chemical equations represent reactions using symbols and formulas, and balanced equations have equal numbers of each element on both sides.
- Common types of reactions include combination, decomposition, displacement, double displacement, precipitation, oxidation, and reduction reactions.
- Exothermic reactions release heat while endothermic reactions absorb heat. Corrosion involves metals deteriorating due to air, moisture or chemicals, while rancidity is the oxidation of oils and fats.
Science ppt 10th class chemical reactions by JeyasuriyaJeyasuriya1999
This PowerPoint presentation covers chemical reactions. It begins by defining physical and chemical changes, and examples of each. It then discusses what a chemical reaction is at a molecular level. The presentation shows examples and animations of chemical reactions to aid understanding. It identifies and explains the main types of chemical reactions: combination, decomposition, displacement, double displacement, oxidation, reduction, redox, endothermic and exothermic reactions. Specific examples are provided for each type of reaction. The presentation concludes by thanking the teachers and classmates for their attention.
CBSE Class 11 Chemistry Chapter 1 (Some Basic Concepts of Chemistry) | Homi I...Homi Institute
Chemistry is the scientific study of the structure of substances and how they change under different conditions or when mixed together. It involves studying molecules and how they combine in fixed ratios according to scientific laws like the law of conservation of mass, the law of definite proportions, and the law of multiple proportions. The average atomic mass of an element takes into account the relative abundance of its different isotopes.
Chemical reactions and equations class 10 CBSEritik
This document discusses chemical reactions and equations. It defines a chemical reaction as a process where reactants are converted into products, which may occur under the influence of a catalyst. It describes how to write chemical equations and balance them by ensuring equal numbers of each type of atom on both sides of the reaction. It also defines and provides examples of different types of chemical reactions: combination, decomposition, displacement, double displacement, and redox reactions. Corrosion and rancidity are discussed as examples of oxidation reactions.
This document discusses the classification and properties of elements as either metals or non-metals. Metals have properties such as sonority, high melting and boiling points, corrosion, and reactions with water and acids to form salts and hydrogen gas. Non-metals tend to have opposite properties, such as low density and melting/boiling points, no corrosion or reaction with water, and limited reactivity with acids. The key differences between metals and non-metals are outlined for several important physical and chemical properties.
Topics Included
• Introduction
• Metals
→ Physical properties of metals
→ Chemical Properties of metals
• Non-metals
→ Physical properties of non-metals
→ Chemical Properties of metals
• Difference between metals and non-metals
• Reaction with Acids
• Reaction with Bases
This document discusses chemical reactions and equations. It begins by defining chemical changes and explaining how they can be identified. It then discusses how chemical reactions are represented through word equations and chemical equations. Chemical equations show the reactants on the left and products on the right, with an arrow indicating the direction of change. Balanced chemical equations ensure the total mass and number of atoms are equal on both sides. The document also describes different types of chemical reactions like combination, decomposition, displacement, and oxidation-reduction reactions. It provides examples of each type and explains key concepts like oxidizing agents and reducing agents. Finally, it discusses applications of chemical reactions like corrosion and rancidity.
Chemical Reaction And Equations
1. A chemical reaction is a process where reactants are converted into products. An equation is a symbolic representation of a reaction.
2. Key parts of a chemical equation include reactants on the left side of the arrow, products on the right side, and coefficients that indicate mole ratios.
3. There are several types of chemical reactions including combination, decomposition, displacement, and double displacement. Oxidation-reduction reactions involve the transfer of electrons between reactants.
An attempt to make the description of chemical reactions a mini-story. Not the best story by any means, but it was pretty well received by the students.
Chpt 9 part ii - types of reactions 031604phspsquires
This document provides an overview of common types of chemical reactions including synthesis, decomposition, single replacement, double replacement, acid-base neutralization, and combustion reactions. Examples of each type of reaction are given along with general formulas. Key concepts covered include ions, oxidation-reduction reactions, and predicting products of different reaction types.
The document discusses various types of chemical reactions including endothermic reactions which absorb energy and exothermic reactions which release energy. It also covers combustion reactions, corrosion reactions, neutralization reactions between acids and bases, reactions between acids and carbonates, and the biological processes of plant respiration and human respiration. The document compares the processes of photosynthesis and respiration.
The document discusses different types of chemical reactions including synthesis, decomposition, single displacement, and double displacement reactions. It provides examples of each type of reaction along with balanced chemical equations. It also describes the activity series of metals and how reactivity determines whether single displacement reactions will occur.
This document discusses a chemistry experiment involving aluminum and copper (II) chloride. The experiment combines aluminum and copper (II) chloride to observe the chemical reaction. The document is titled "Aluminum & Copper II Chloride" and was created by Mr. W.
This document provides an overview of chemical bonding, including ions, ionic bonds, covalent bonds, and metallic bonds. It discusses the formation of cations and anions and how ions combine to form ionic compounds. It also covers covalent bonding, including how single, double and triple bonds are formed via orbital overlap. The document explains how to write formulas for ionic and covalent compounds using oxidation states to determine subscripts. Key properties of ionic and covalent compounds are also summarized.
The document discusses functional groups and biochemical reactions. It defines functional groups as small reactive groups present in biomolecules like carbohydrates, lipids, proteins, and nucleic acids that determine a molecule's chemical properties. It provides examples of common functional groups like amino, carbonyl, carboxyl, hydroxyl, sulfhydryl, and phosphate. It then discusses characteristic features of functional groups and six major types of biochemical reactions: condensation, hydrolysis, neutralization, oxidation, reduction, and redox reactions.
The document discusses the mole, which relates the number of particles in a substance to its mass in grams. It defines one mole as 6.02 x 10^23 particles, known as Avogadro's number. It provides examples of calculating moles, mass, and number of particles using molar mass and unit conversion with moles. Key relationships discussed are mass=moles×molar mass and number of particles=moles×Avogadro's number.
Bio unit 1 biological elements and biomolecules notesrozemak1
This document summarizes the key biological elements and biomolecules that make up all living things. It notes that all living things are made of atoms that bond together to form stable molecules. The six most important biological elements are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Carbon is particularly important as it can form four bonds, allowing it to create a diverse range of molecular structures and functions. The four main biomolecules are carbohydrates, lipids, proteins, and nucleic acids, each composed of various combinations of the six biological elements. These biomolecules serve essential roles like energy storage, structure, catalysis, and information transfer.
Chemical Reactions is a document written by Sarah Jones. The document appears to be about chemical reactions as the title suggests. No other details are provided in the short document, so the topic and author are the key points that can be summarized.
The document discusses various topics relating to chemical reactions, including:
1) Chemical reaction indicators like color change, heat/light/sound production, gas formation, and precipitation.
2) The law of conservation of mass discovered by Antoine Lavoisier, which states that the total mass of reactants equals the total mass of products in a chemical reaction.
3) Different types of chemical reactions like decomposition, combination, precipitation, oxidation, and reduction reactions.
Biomolecules (Mainly Carbohydrates, Proteins, Lipids and Nucleic Acids ) Production form Microorganisms and their Industrial applications were discussed....
Green chemistry, Its Applications and BenefitsAmit Amola
Green chemistry is the design of chemical products and processes to reduce or eliminate the use and generation of hazardous substances. It was formally established 15 years ago by the EPA in response to pollution regulations. The key principles of green chemistry developed by Anastas and Warner include preventing waste through inherently safer design of synthesis processes and products. Examples show how green chemistry has led to replacement of hazardous chemicals like phosgene and solvents like benzene with safer alternatives like solid-state synthesis routes and ionic liquids.
Biomolecules include carbohydrates, lipids, proteins and nucleic acids. Carbohydrates include monosaccharides like glucose that join to form disaccharides like sucrose or polysaccharides like starch for storage. Lipids are insoluble in water, made of fatty acid esters, and serve as energy stores. Proteins are made of amino acid chains and perform important functions like catalysis and transport.
Biomolecules are groups of atoms containing more than one element that are involved in maintaining and metabolic processes of living organisms. There are four main types of biomolecules: carbohydrates, lipids, proteins, and nucleic acids. Carbohydrates are made of carbon, hydrogen, and oxygen and function as an energy source. Lipids also contain carbon, hydrogen, and oxygen and function to store energy. Proteins contain carbon, hydrogen, oxygen, and nitrogen and function in building and repairing cells as well as speeding up or slowing down chemical reactions. Nucleic acids contain carbon, hydrogen, oxygen, nitrogen, and phosphorus and function to store genetic information and determine physical appearance.
This document discusses types of chemical reactions, including:
1) Combination reactions where two or more reactants combine to form products, such as magnesium combining with oxygen to form magnesium oxide.
2) Displacement reactions which can be metal-metal, where a more reactive metal displaces a less reactive one, or metal-nonmetal where a metal displaces a nonmetal.
3) The document provides examples of combination and displacement reactions and classifies common types of chemical reactions like decomposition, double displacement, and oxidation-reduction reactions.
1) Biomolecules are organic compounds found in living tissues and include carbohydrates, fats, proteins, amino acids, and lipids.
2) Living tissues can be broken down through chemical processes to obtain acid-soluble and acid-insoluble fractions containing different types of biomolecules.
3) Elemental analysis and analysis of organic and inorganic compounds provides information about the composition of living tissues.
Human activities negatively impact natural resources through overuse and pollution. Renewable resources like forests can be depleted if used faster than they can regenerate. Non-renewable resources like fossil fuels are being burned, releasing carbon dioxide and leading to their eventual depletion. Specific human impacts include deforestation, overfishing, water and air pollution, and solid waste pollution, which degrade habitats and water quality. If not addressed, this degradation will negatively affect Caribbean tourism and economies by damaging ecosystems and habitats.
The document provides details about biomolecules found in living organisms. It discusses the chemical composition of tissues and cells, including micro and macromolecules. Specific biomolecules covered include amino acids, sugars, lipids, nucleotides, and proteins. The roles and structures of these biomolecules are described. Additionally, the document outlines metabolic pathways and explains the role of enzymes in catalyzing biochemical reactions. In summary, the document is a comprehensive overview of the major biomolecules found in living organisms, their structures and functions, as well as enzymatic processes and metabolism.
Chemical reactions involve the rearrangement of atoms and the formation of new substances. Signs that a chemical reaction has occurred include a change in color, temperature, state, evolution of a gas, or the formation of a precipitate. Chemical equations are used to represent chemical reactions, with reactants on the left side of the arrow and products on the right. The equation must satisfy the law of conservation of mass. Common types of chemical reactions include combination, decomposition, displacement, and oxidation-reduction reactions.
FellowBuddy.com is a platform which has been setup with a simple vision, keeping in mind the dynamic requirements of students.
Our Vision & Mission - Simplifying Students Life
Our Belief - “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom-446240585585480
1) A chemical reaction is a process where one or more new substances are formed. Chemical equations represent reactions using symbols for reactants and products.
2) Balanced chemical equations ensure the same number and type of atoms for each element on both sides of the reaction arrow.
3) Common reaction types include combination, decomposition, displacement, and double displacement. Combination reactions form one product from two or more reactants while decomposition reactions break down one reactant into multiple products.
Acid Bases and Salts and Chemical EquationsSanchit Duseja
1) The document discusses chemical reactions and equations, focusing on chemical changes, types of chemical equations, and balanced chemical equations.
2) It then covers the five main types of chemical reactions - combination, decomposition, displacement, double displacement, and oxidation-reduction reactions.
3) Finally, it discusses acids, bases, and salts. It defines acids and bases, lists their key properties, methods of classification, common examples, and uses.
The document provides information about various chemical reactions:
1. Decomposition reactions involve a single reactant breaking down into simpler products, such as ferrous sulfate decomposing into ferric oxide, sulfur dioxide, and sulfur trioxide when heated.
2. Displacement reactions occur when a more reactive element displaces a less reactive element from its compound, like iron displacing copper from copper sulfate solution.
3. Double displacement reactions involve the switching of ions between reactants to form new ionic compounds, exemplified by the reaction of barium chloride and sodium sulfate forming barium sulfate and sodium chloride.
4. Combination reactions form a single product from two or more reactants, such as calcium oxide react
Class 10 chemical reactions and equationssarunkumar31
Types of reactions, Redox reactions, Reaction between acid and metal, Types of decomposition reaction, corrosion and rancidity.Acidic and basic nature of oxide, prevention method of corrosion.
This document provides an overview of the key concepts from the chapters on Chemical Reactions and Equations, Acids, Bases and Salts that will be covered in the Class X science support material. It outlines the gist of each lesson, mind maps, formative assessments, higher order thinking skills questions, and sample question papers. The support material aims to help students understand the important concepts and practice questions in accordance with the CBSE CCE scheme of evaluation.
Chapter 1 chemical reactions and equations || science || class 10NishitGajjar7
This document provides an overview of chemical reactions and equations. It defines chemical reactions as transformations of substances into different substances through rearrangements of atoms. Reactants are the initial substances and products are the resulting substances. Chemical reactions can be identified through changes in state, color, gas evolution or temperature. The document also describes how to write and balance chemical equations, and defines several types of chemical reactions including combination, decomposition, displacement and oxidation-reduction reactions. Specific examples of each type are given.
Chemical reaction and equation class 10 chapter 1prajapatiAditya
This document discusses chemical reactions and equations. It defines a chemical reaction as a process where reactants are converted into products, which may occur under the influence of a catalyst. It describes how to write word and chemical equations, and how to balance chemical equations by ensuring equal numbers of each type of atom on both sides. It also defines and provides examples of different types of chemical reactions: combination, decomposition, displacement, double displacement, and redox reactions. Corrosion and rancidity are discussed as examples of oxidation reactions.
This document discusses chemical reactions and equations. It defines a chemical reaction as a process where reactants are converted into products, which may be influenced by a catalyst. It explains how to identify a chemical reaction based on changes in state, color, gas evolution or temperature. The document also discusses the different types of chemical reactions including combination, decomposition, displacement, double displacement and redox reactions. Examples of each type of reaction are provided. Balancing chemical equations and writing chemical formulas are also covered.
This document discusses chemical reactions and equations. It defines a chemical reaction as a process where reactants are converted into products, which may occur under the influence of a catalyst. It describes how to write word and chemical equations, and how to balance chemical equations by ensuring equal numbers of each type of atom on both sides. It also defines and provides examples of different types of chemical reactions: combination, decomposition, displacement, double displacement, and redox reactions. Corrosion and rancidity are discussed as examples of oxidation reactions.
The document discusses chemical reactions and equations. It defines a chemical reaction as a process involving a chemical change where new substances are formed. A chemical equation is used to represent chemical reactions, showing reactants on the left and products on the right. There are five main types of chemical reactions: combination, decomposition, displacement, double displacement, and redox reactions. Redox reactions involve the gain or loss of oxygen or hydrogen through oxidation and reduction.
This features the types of chemical reactions: Combustion, Neutralization, Precipitation and RedOx Reactions.
There are sample in each of the type of reaction that can help the learners understand more about each type.
This document provides information about chemical reactions and equations. It defines a chemical reaction as one where the original state of particles changes and cannot be reversed by physical means alone. It describes several types of chemical reactions including combination, decomposition, displacement, and oxidation-reduction. It also discusses how to write and balance chemical equations. Additional topics covered include corrosion, how to prevent rust, and applications of redox reactions such as in batteries, metabolism, and combustion.
Chemistry is the study of substances and their composition, structure, properties, and reactions. Chemical reactions occur all around us in many everyday processes from starting a car to digesting food. Organic chemistry is the study of carbon compounds, which are found in materials like plastics and polymers as well as living things like DNA and foods. Chemical and physical changes can be distinguished based on whether the identity of a substance changes, with chemical changes occurring at the molecular level to form new substances. Acids and bases are found throughout the body and in many other natural and industrial processes.
Class-10-Chapter-01-Science-Chemistry-Chemical Reactions and Equations.pptxSoftcare Solution
Hello Friends,
Check out our new PowerPoint presentation on "Chemical Reactions and Equations" | Introduction to Chemical Reactions and Equations by softcare solution. We know these things in our daily life. Let’s them understand some concept about Chemical Reactions and Equations. At the end of this video, you will be able to understand the following points on Chemical Reactions and Equations: *******************************************************************
1. Chemical Reaction and Chemical Equation.
2. Types of Chemical Reaction.
3. Redox Reaction..
4. Corrosion and Rancidity.
*******************************************************************
NCERT solutions for Class 10th science.
****************************************************
We cover Complete Syllabus of All subjects
****************************************************
Our Study channel : For Business Enquiry - amitpandey.hrd@gmail.com
Like Our Facebook page - https://www.facebook.com/softcaresolu...
Follow us on twitter - @amitpandeyhrd
Our website : - www.nirsoftcaresolution.com/
***************************************************
Thank you for watching. If you liked the video, consider subscribing :)
✴️✔️ Do 𝐒𝐔𝐁𝐒𝐂𝐑𝐈𝐁𝐄 to the channel for more updates and hit that like button!
❤️ https://www.youtube.com/channel/softc...
(Turn on your notification 🔔 to get all updates before anyone!!)
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
3. For this project I would like to thank our
Science Teacher- MR. VIKES KUMAR
PANDYA SIR as he had provided me a lot of
efforts . I would also like to thank our
Principal who gave me a golden opportunity
to show my talent – MR.NAGENDRA
PANDAY SIR . I would also like to thank my
Parents as they provided me with all the
necessary materials needed for the project.
4.
5. Chemical Reactions are associated with chemical
change.
Whenever a chemical change occurs chemical
reaction is said to take place.
Chemical reactions are usually irreversible and a
new product is formed.
6. Signs of Chemical Reactions
There are five main signs that indicate a chemical reaction has taken place:
Change in color Evolution of a gas
Change in
temperature
Change in state
Formation of
precipitate
7. A WORD EQUATION describes chemical change
using the names of the reactants and products.
The word equation for the reaction of methane gas with
oxygen gas to form carbon dioxide and water is follows :-
methane + oxygen
Reactant Product
CH4
O2 CO2 H2O+ + 22
carbon dioxide + water
8. The simplest form of description of a
chemical reaction in a shorter form is by
writing it in the form of an equation. E.g.-
2Mg + O2 2MgO
The reactants are written on the left side
and product is written on the right side.
An arrow is placed between them to
show the direction of reaction.
9. The equation must represent known
facts.
The equation must contain the correct
formulas for the reactants and
products.
The law of conservation of mass must
be satisfied.
10. Showing Phases inShowing Phases in
Chemical EquationsChemical Equations
Solid Phase – the substance is relatively rigid and has a definite
volume and shape. NaCl(s)
Liquid Phase – the substance has a definite volume, but is able
to change shape by flowing. H2O(l)
Gaseous Phase – the substance has no definite volume or shape,
and it shows little response to gravity. Cl2(g)
H2O(s) H2O(l) H2O(g)
11. • According to the law of conservation of mass, total
mass must be equal on the both sides of the
equation.
• This type of equation is known as a balanced
chemical reaction. E.g.-
2Mg + O2 2MgO
• Here both sides have two atoms of Magnesium and
two atoms of Oxygen.
12. Cl
Cl
H
H
H
ClClCl
Cl HH
H
H
H2 + Cl1 HCl H2 + 2Cl1 2 HCl
reactants products
H
Cl
reactants products
H
Cl
2
1
2 2
2 2
1
1
(Unbalanced) (Balanced)
Unbalanced and Balanced Equations
14. ?
Visualizing a Chemical Reaction
Na + Cl NaCl
___ mole Cl ___ mole NaCl___ mole Na10 10 1010 10
15. 1. Combination reaction
2. Decomposition reaction
3. Single-displacement reaction
4. Double-displacement reaction
A + B AB
AB A + B
A + BC AC + B
AB + CD AD + CB
5. Redox reaction
16. These type of reactions occur when two
reactants combine to form one or more
products. E.g. –
1. CaO + H2O Ca(OH)2
2. C + O2 CO2
They are generally exothermic reactions which
involve evolution of heat during reaction.
18. Decomposition Reaction
• The types of reaction in which a single reactant
breaks down to give simpler products are called
decomposition reaction. E.g.-
• When a decomposition reaction is carried out by
heating, it is known as thermal decomposition.
2 H2O 2 H2 + O2
20. H2O H2 + O2
electricity
H2O2 H2O + O2
NI3 N2 + I2
2 2
Hydrogen Peroxide
Electrolysis of water
2 2
Nitrogen triiodide
AB A + B
General Form
2 3
21. • The reaction in which a more reactive
element displaces a less reactive element
from its solution is known as displacement
reaction.
• They are of two types:-
1.Single Displacement Reaction
2.Double Displacement Reaction
22. Double-replacement reaction
CaCO3 + 2 HCl CaCl2 + H2CO3
General form:
AB + CD AD + CB
Single-replacement reaction
Mg + CuSO4 MgSO4 + Cu
General form:
A + BC AC + B
23. PbI2
K1+
Pb2+
lead (II) chloride + potassium iodide
Cl2
I
Pb2+
Pb
K1+
K
Cl1-
I1-
Cl1-
I1-
KCl
potassium chloride lead (II) iodide+
(aq) (ppt)
+ +
25. Ca
Foiled again –Foiled again –
Aluminum loses to CalciumAluminum loses to Calcium
Element Reactivity
26. • If a substance gains oxygen during a reaction, it is
said to be oxidised.
• If a substance loses oxygen during a reaction, it is
said to be reduced.
• Reactions in which this type of change occurs is
known as Oxidation and Reduction reactions or
Redox reactions. E.g. –
CuO + H2 Cu + H2O
Reduction
Oxidation
27. What is Rancidity and how it occurs?
Rancidity is a very general term and in its most general
meaning, it refers to the spoilage of a food in such a way
that it becomes undesirable (and usually unsafe) for
consumption.
It is characterized by an unpleasant smell and taste.
The term “rancid” particularly applies to oils and fats. When
food scientists talk about rancidity, they are
often talking about a specific type of rancidity
Involving oxygen damage to foods, and this
type of rancidity is called "oxidative rancidity.”
Oxidation of fats (rancidity) is caused by a
biochemical reaction between fats and oxygen.
In this process the long-chain fatty acids are
degraded and short-chain compounds are formed.
One of the reaction products is butyric acid,
which causes the typical rancid taste.
28. Factors causing Rancidity
1. Temperature – Rancidity rate increases with increase in
temperature.
2. Duration – For the more time you keep a thing
unattended or without using it, it has more
chances to turn rancid.
3. Oxygen – Oxygen promotes the decomposition
of food.
4. Light - In the presence of oxygen, light
promotes the decomposition of unsaturated fatty acids.
5. Microorganisms and fungi (molds) – They are the most common
reason for the food to become rancid . They use their enzymes on the
food material and destroy its chemical
composition.
6. Moisture - Moist air helps the microbes in
their activity upon the food material.
7. Trace elements – Trace elements like Fe
and Zn also increase the rate of rancidity.
29. Some food items that are likely to turn
rancid
1.
2.
3.
- Various Vegetable oils.
- Clarified butter (Ghee).
- Butter
30. Some food items that are likely to turn
rancid
4.
5.
6.
- Fishes and
crustaceans.
- Bread.
- Pickle
31. Some food items that are likely to turn
rancid
7.
8.
9.
- Baked Potato.
- Shell eggs.
- Meat
32. Preventive measures
1. Adding Inert gases – Inert gas can be added to the packet or the
container like nitrogen, which does not react with oxygen. Example –
Chips packets are flushed with nitrogen gas, so they don’t become
rancid.
2. Adding antioxidants- Antioxidants are added to some foods to
slow down or eliminate oxidative deterioration. Examples-
* BHA – Butylated Hydroxy Anisole.
* BHT – Butylated Hydroxy Toluene.
3. Refrigeration – Refrigerators reduce the temperature and hence
don’t allow the microbes to continue their processes.
4. Vacuum packaging – Vacuum packaging is done to keep oxygen out.
5. By using oxygen scavengers- Oxygen scavengers or oxygen
absorbers are added to enclosed packaging to help remove or
decrease the level of oxygen in the package. They are used to help
maintain product safety and extend shelf life.
6. Keeping food in air tight containers – Less air too prevents
rancidity.
7. By storing food in dark place.
34. Harmful effects of consuming rancid food
Consuming rancid food products is unlikely to cause immediate
illness or harm. Rancidification can reduce the nutritional value
of food, and some vitamins are highly sensitive to degradation.
In addition, rancidification can produce potentially toxic
compounds associated with long-term harmful health effects
concerning advanced aging and neurological disorders. Rancid
fats have also been implicated in increased rates of heart
disease, atherosclerosis and are carcinogenic (cancer causing).
Rancid food can cause
cancer
Rancid food can cause heart
diseases
35. What is Corrosion and how it occurs?
Corrosion is the oxidization of metals in the presence of air(oxygen)
and moisture to form compounds of the metals. Corrosion converts
refined metal to their more stable oxide. It is the gradual destruction
of materials (usually metals) by chemical reaction with their
environment.
Corrosion can occur in two general ways:
Generalized Corrosion: Typically never
Happens , aside from in acidic conditions. This
uniform corrosion over the entire surface of
the metal is rare and leads to overall thinning
which has little effect outside of fatigue and
stress conditions.
Localized Corrosion: The most common, and most detrimental, form of
localized corrosion is pitting. Pitting is when the attack happens in one
single location on the surface and creates a pit, or small cavity, in the
metal. This type of corrosion attack is hard to prevent, engineer
against, and often times difficult to detect before structural failure is
met due to cracking. Pipes are often compromised due to pitting.
36. Ill-effects of Corrosion
Losses are economic and safety:
• Reduced Strength
• Downtime of equipment
• Decrease in weight
• Lost surface properties
• Reduced value of goods
The consequences of corrosion are many and varied and
the effects of these on the safe, reliable and
efficient operation of equipment or structures are
often more serious than the simple loss of a mass of
metal. Failures of various kinds and the need for
expensive replacements may occur even though the
amount of metal destroyed is quite small.
37. Corrosion of different metals and alloys
1.
2.
3.
- Iron (Fe) (Rusting)
- Copper (Cu)
- Silver (Ag)
38. Corrosion of different metals and alloys
4.
5.
6.
- Lead (Pb)
- Gold (Au)
- Platinum (Pt)
40. Preventive measures
1. Painting - Paints can protect metals from the degrading
effect of environmental gases.
2. Galvanization – It is the process of applying a
protective zinc coating to steel or iron, to prevent rusting.
The most common method is hot-dip galvanization, in which
parts are submerged in a bath of molten zinc.
3. Electroplating – This helps in avoiding the metal to have a
direct contact with the environment.
4. Alloying - Corrosion can also be prevented by making
alloys.
5. Anodization – It is a surface treatment which prevents
corrosion.
6. Cathodic protection (CP) - It is a technique to control
the corrosion of a metal surface by making that surface
the cathode of an electrochemical cell.
7. Enameling – It too helps in preventing corrosion.
Chemical Reaction - Study Questions
1. What is a chemical reaction?
2. What is evidence a reaction has occurred?
3. What is a chemical equation?
4. Define reactants.
5. Define products.
6. Define catalyst.
7. What information is found in an equation?
8. What symbols are used to represent the states of matter?
9. What is the meaning of “aq”?
10. How do you indicate a catalyst is being used in a reaction?
11. What is activation energy?
12. What the three things does conservation of matter require of chemical equations?
13. What is the procedure for balancing a chemical equation?
14. Balance the equation for the reaction of magnesium chloride and silver nitrate to form magnesium nitrate and silver chloride.
15. What is a synthesis reaction?
16. How is a combustion reaction related to a synthesis reaction?
17. What type of reaction is an explosion?
18. Compare decomposition and dissociation.
19. What determines whether one metal will replace another in a single displacement reaction?
20. What is the general form of a double displacement reaction?
21. What type of reaction is each of these?
2Na(s) + Cl2(g) 2NaCl(s)
PCl5(s) PCl3(s) + Cl2(g)
2Al(s) + Fe2O3(s) 2Fe(s) + Al2O3(s)
C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(l)
BaCl2(aq) + H2SO4(aq) 2HCl(aq) + BaSO4(s)
22. What is the oxidation number of an element?
23. What is the oxidation number of the fluorine ion?
24. What is the sum of the oxidation numbers in a compound?
31. Can a redox reaction form a molecule? Explain your answer.
A chemical equation is an expression that gives the identities and quantities of the substances in a chemical reaction
Chemical formulas and other symbols are used to indicate the starting material(s) or reactant(s), which are written on the left side of the equation, and the final compound(s) or product(s), which are written on the right side. An arrow, read as yields or reacts to form, points from the reactants to the products.
Abbreviations are added in parentheses as subscripts to indicate the physical state of each species:—(s) for solid, (l) for liquid, (g) for gas, and (aq) for an aqueous solution.
A balanced chemical equation is when both the numbers of each type of atom and the total charge are the same on both sides. A chemical reaction represents a change in the distribution of atoms but not in the number of atoms.
http://img.alibaba.com/photo/10784694/Aluminum_Oxide_Abrasive_Fine_Grit_120_220_.jpg
http://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Corundum_Aluminum_Oxide_Gallantin_Co_MontanaDSC03201.jpg/600px-Corundum_Aluminum_Oxide_Gallantin_Co_MontanaDSC03201.jpg
http://www.germes-online.com/direct/dbimage/50327532/Aluminum_Alloy_Pipe.jpg
Objective:
To classify a chemical reaction as one of the following types: combination (synthesis), decomposition, single replacement, double replacement, or neutralization.
A reaction that yields an insoluble product, a precipitate, when two solutions are mixed
Are a subclass of exchange reactions that occur between ionic compounds when one of the products is insoluble
Used to isolate metals that have been extracted from their ores and to recover precious metals for recycling
Objectives:
To explain the concept of an activity series for metals.
To predict whether a single-replacement reaction occurs by referring to the activity series.
The Activity Series
– Predicts the outcome of the single-displacement reactions
– Arranges metal and hydrogen in decreasing order of their tendency to be oxidized
– Active metals at the top of the series have the greatest tendency to lose electrons; these including alkali metals (Group 1), alkaline earths (Group 2), and Al (Group 13).
– Inert metals at the bottom of the series have the lowest tendency to be oxidized; these include precious metals or coinage metals located in the lower-right portion of the metals in the periodic table.
– Any element will reduce compounds of the elements below it in the series.
– Only those metals that lie above hydrogen in the activity series dissolve in acids to produce H2.