Understanding acids and bases.ppt 2012
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This document discusses acids and bases and their pH levels. It provides examples of common substances and their pH values on the pH scale from 0 to 14. It describes the characteristics of acids as having a pH less than 7, tasting sour, corroding metal, and conducting electricity well. It describes bases as having a pH greater than 7, tasting bitter, and being good cleaners that feel slippery. It explains that the pH scale is logarithmic, so each unit of pH represents a tenfold change in acidity or alkalinity.
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This document discusses acids and bases. It defines acids as solutions with excess hydrogen ions that have sour tastes, can conduct electricity, and corrode substances. Bases are defined as solutions with excess hydroxide ions that feel slippery, taste bitter, and conduct electricity. The document explains that acids and bases have characteristic properties, such as their effects on litmus paper and reactions with metals. It also introduces the pH scale for measuring acidity and basicity and notes that acid-base reactions involve neutralization.
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The document discusses acids and bases. It explains that acids have a sour taste and turn litmus paper red, while bases are bitter and turn litmus paper blue. The pH scale from 0 to 14 is used to measure how acidic or basic a substance is, with acids having a lower pH and bases having a higher pH. Common acids include lemon juice, vinegar and battery acid, while bases include soap, baking soda and milk of magnesia. The document also provides examples of using indicators and experiments to test the acidity of different substances.
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ACIDS AND BASES.pptx
1) Acids release hydrogen ions (H+) in water, turning litmus paper red and having a sour taste, while bases release hydroxide ions (OH-), turning litmus blue and having a bitter taste.
2) The pH scale measures the acidity or alkalinity of solutions, with values from 0-7 being acidic, 7 being neutral, and 7-14 being alkaline. Strong acids and bases fully dissociate in water while weak acids and bases only partially dissociate.
3) Acid-base indicators change color depending on the pH, allowing identification of acids and bases. Litmus is commonly used, turning red in acids and blue in bases. Neutralization occurs
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9-12 ppt of Acids and Bases. Students will learn that the chemical difference between acids and bases is that acids produce hydrogen ions and bases accept hydrogen ions. A base is a substance that neutralises acids. When bases are added to water, they split to form hydroxide ions, written as OH-. We call a base that has been added to water an alkaline solution. Students will also learn that an acid–base reaction is a chemical reaction that occurs between an acid and a base. It can be used to determine pH via titration.
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A solar eclipse occurs when the moon passes between the sun and Earth, casting its shadow on Earth and fully or partially blocking the sun's light in some areas. Students will be escorted outside at 8:00 to view the eclipse using pinhole projection, which projects the sun's image onto a surface through a small opening, allowing viewing without looking directly at the sun which can damage eyesight. Safety is important and students should only view the eclipse using the provided pinhole projection method.
Halloween for blog
The document provides instructions for making an Anti Spirit Potion and Anti Spirit Slime to ward off ghosts, ghouls, zombies, and spirits. The potion requires mixing diluted frog blood, rat scat, toad tinkle, eye of newt, and bee sputum in a cauldron for 36 seconds and then ladling it into a goblet. The slime is made by combining the Anti Spirit solution with spirit fix in beakers, stirring, and letting it set for 30 seconds. Chanting is also mentioned as part of using the potion and slime on Halloween to make spirits disappear in a blink.
Introduction to electricity
This document discusses the key components needed for a light circuit, including a voltage source, path or resistor, and a complete circuit. It defines current electricity as the flow of electrons through a conductive material, a circuit as a complete path for electrons to flow, a volt as a measure of the push of electrons, a conductor as a material where electrons can move freely, and an insulator as a material where electrons cannot move freely.
Who wants to be a millionaire game chemistry 2014
The document is a quiz about chemical reactions and properties of matter. It covers topics like chemical changes versus physical changes, exothermic versus endothermic reactions, products formed from chemical reactions, properties of elements and compounds, writing chemical formulas, and identifying reactants, atoms and molecules in chemical compounds. The quiz contains multiple choice questions testing understanding of these foundational chemistry concepts.
Who wants to be a millionaire 2014
This document contains a science lesson about mass, volume, density, and how these properties determine if an object will float or sink in water. It includes definitions of mass, volume, and density. It also discusses how an object's density compares to the density of water (1 g/cm3) determines if it will float, sink, or be neutrally buoyant. Examples and practice problems are provided to help understand these concepts.
Back to school night presentation 2014
The document provides the schedule for a Back to School Night event for Gamma A students. It lists the times for each class visit and informs parents to get their child's schedule from their homebase teacher if needed. Parents are also asked to make and wear a name tag upon arrival.
Student presentation 2014 first day
The document provides information about special events for 6th grade students to look forward to such as field trips, field day, and musical performances. It also lists recommended areas for students to spend time during lunch and break such as the cafeteria, courtyard, and library as well as areas to avoid like classrooms and corridors. Finally, the schedule for the next day is outlined including homebase, assemblies, class rotations, lunch, and a reminder about an upcoming computer boot camp.
2014 sungei reminder powerpoint
Students will go on a field trip to Sungei Buloh wetlands on Monday. They should wear comfortable clothes and bring mosquito repellent, sunscreen, water, snacks, and a small backpack. Students must stay with their assigned group and buddy. Upon arrival, they will go on hiking routes with their leader. After hiking, they will have lunch back at school. There is also an optional nature photo competition with four categories that students can enter by submitting printed photos to be judged.
Poor fred final
The document outlines three rules for an activity where students must save "Fred" from drowning using only four paper clips:
1. Fred can only fall into the sea table once, or he will drown
2. Students cannot injure Fred in any way
3. Students are only allowed to use four paper clips to move Fred, a boat, and a life preserver, and can only touch the paper clips.
Review 2013 - who wants to be a millionaire - intro
An object will float if its density is less than the liquid it is in. An object will sink if its density is greater than the liquid it is in. An object is neutrally buoyant if its density is equal to the liquid it is in. If an object's volume stays the same and its mass increases, its density increases. If an object's mass stays the same and its volume increases, its density decreases.
Laboratory equipment self review 2013
The document lists and describes various pieces of lab equipment used for microscopy, chemistry experiments, and dissection. Key equipment includes microscopes for examining specimens, microscope slides for preparing samples, beakers and flasks for holding or heating liquids, graduated cylinders and pipettes for measuring small volumes, burners and stands for heating substances, and tools like forceps, scalpels, and needles for dissection. Safety equipment like goggles and balances are also mentioned.
Laboratory equipment self review 2013
The document lists and describes various pieces of laboratory equipment used in experiments and specimen preparation including microscopes for viewing specimens, microscope slides and reagent bottles for holding samples, Florence flasks and beakers for liquid storage and heating, graduated cylinders and pipettes for measuring liquids, test tubes and test tube racks for chemical testing, petri dishes for culturing microorganisms, thermometers for temperature measurement, ring stands and wire gauze for apparatus support, mortar and pestles for grinding, Bunsen burners for heating, forceps and scalpels for dissection, and balances for mass measurement.
Lab equipment.ppt 2013
This document lists and describes 30 pieces of common laboratory equipment used in experiments and investigations. Some of the key equipment includes microscopes for examining specimens, beakers and flasks for holding or heating liquids, graduated cylinders and pipettes for measuring small volumes of liquids, burners for providing heat, slides and dishes for preparing and viewing samples, and balances for measuring mass. Other tools such as forceps, scissors, and needles are used for dissection or handling small items. Safety equipment like goggles help protect researchers.
Lab equipment review
This document lists and describes common laboratory equipment used in science experiments including: test tubes for holding chemicals, thermometers for measuring temperature, beakers for measuring and pouring liquids, microscopes for examining specimens, balances and scales for measuring mass, pipettes for precise liquid measurements, Bunsen burners and hot plates for heating substances, and various clamps, tongs, dishes, slides and other tools for preparation, handling and analysis. Safety equipment like goggles and gloves are also included.
Lesson 31, 32
This document discusses the spread of germs and diseases. It contains information about identifying diseases that people are familiar with, understanding epidemiology and how diseases spread through populations, and an activity where students play as epidemiologists to trace how a disease spread from an initial carrier. The document contains instructions for classroom activities to help students learn about identifying diseases, carriers, and tracing how infections are transmitted between individuals.
Lesson 31, 32
This document discusses the spread of germs and diseases. It contains information about identifying diseases that people are familiar with, tracking the spread of diseases through populations as an epidemiologist would, and identifying disease carriers who can spread infection without getting sick themselves. Students are instructed to find classmates familiar with different diseases, answer questions from a textbook, and participate in an activity moving cards to trace disease transmission and identify carriers.
Lesson 31, 32
This document discusses the spread of germs and diseases. It contains information about identifying diseases that people are familiar with, tracking how diseases spread through populations like epidemiologists, and an activity where students play the role of epidemiologists to identify disease carriers. Students are asked to bring in a sheet the next week to find out if family members had diseases, and there are exercises to answer questions from a book and discuss graphs.
Acid base review 2013
The document summarizes key concepts about acids and bases:
- The pH scale measures how acidic or alkaline a substance is from 0-14. Phenolphthalein and bromothymol blue are acid-base indicators that change color. Universal indicator can be used to test unknown solutions and determine pH.
- Strong acids have a pH of 0-1 and strong bases 13-14. Acids contain hydrogen ions and bases contain hydroxide ions. Examples of acidic foods are citrus fruits and milk. Cleaners are often bases.
- Acids taste sour and pure water is neutral. Stronger acids have lower pH numbers. The pH range of normal rain is 5.6-6.
Acid base review 2013
The document summarizes key concepts about acids and bases:
- The pH scale measures how acidic or alkaline a substance is from 0-14. Phenolphthalein and bromothymol blue are acid-base indicators that change color with pH. Universal indicator can be used to test an unknown solution's pH.
- Strong acids have a pH of 0-1 and strong bases 13-14. Acids contain H+ ions and bases contain OH- ions. Common acids include citrus fruits and milk while cleaners contain bases.
- Neutralization is adding a base to an acid until the pH is close to 7. Carbon dioxide forms carbonic acid in water.
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Review 2013 - who wants to be a millionaire - intro
Review 2013 - who wants to be a millionaire - intro
Understanding acids and bases.ppt 2012
- 3. Understanding Acids and Bases Distilled Water 7 - ish Saliva 6 -7.4 Tap Water 7.5-8 Battery Acid .5-1 Baking Soda 8.5 - 9 Stomach Acid .5-1 Lemon Juice 2.5-3 Milk 6.5 Normal Rain 5.6-6.5 Ammonia 11-12 Vinegar 2.5-3 Orange Juice 3.5 Drain Cleaner 12 - 14 Cola 2.5-4 (NaOH)
- 4. Putting it all Together
- 5. Characteristics of Acids Taste sour pH less than 7 Corrode Metal Conduct electricity very well
- 6. Characteristics of Bases pH greater than 7 Taste bitter Good Cleaners Feel slippery
- 7. Understanding the pH Scale Acidic Basic 0 7 14 Neutral •The pH scale is a logrithmic scale. •A difference of one pH unit represents a tenfold change •A difference of 2 pH units, for example from 6 to 4, would mean that the acidity one hundred times greater.
- 8. Check Your Understanding How many times more acidic is a tomato than coffee? 10 How many times more acidic is tomato than saliva? 100 How many times more acidic is lemon juice than coffee? 1,000
Editor's Notes
- For Rhuter class – have studuents scratch off PROBE and write in GIZMO Chris and Sandy – students use probeware to record
- Carry on to the liquid indicator lab and then to the Inquiry.