Reaction Types
Classifying Reactions• There are millions of substances and  many different possible reactions• There are only a few gener...
Synthesis Reactions• Combine substances• Reaction of at least 2 reactants  combine to form a product• A + B -- AB• Always ...
Decomposition Reactions• Break substances apart• Reaction in which one compound reaks  into at least 2 products• AB -- A +...
Combustion Reactions• Use oxygen as a reactant• Oxygen is a reactant in EVERY  combustion reaction
Single Displacement                      Reactions• Elements trade places• XA + B -- BA + X• Usually, a more reactive elem...
Double-Displacement                      Reaction• Reaction in which a gas, solid  precipitate, or a molecular compound  i...
Electrons and Chemical                     Reactions• Classes of reactions (Synthesis,  Decomposition, Combustion, Single-...
Redox Reactions• Reduction/Oxidation Reaction• A reaction that occurs when  electrons are transferred from one  reactant t...
Summary• Synthesis reactions make larger  molecules• Decomposition breaks compounds  apart• In combustion reactions, subst...
Summary cont...• In double-displacement reactions,  ions appear to move between  compounds, resulting in a solid that  set...
Question 1• Classify each of the following  reactions by type  –   A) S8 + 8O2 -- 8SO2 + heat  –   B) 6CO2 + 6H2O -- C6H12...
Question 2• Identify which element is oxidized  and which element is reduced in the  following reaction  – Zn + CuSO4 -- Z...
Question 3• Compare and contrast single-  displacement and double-displacement  reactions based on the number of  reactant...
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Module 13 lesson 1 notes

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Module 13 lesson 1 notes

  1. 1. Reaction Types
  2. 2. Classifying Reactions• There are millions of substances and many different possible reactions• There are only a few general reaction types• Just like there are ways to identify the names of compounds, there are ways to identify types of chemical reactions and predict the products
  3. 3. Synthesis Reactions• Combine substances• Reaction of at least 2 reactants combine to form a product• A + B -- AB• Always join substances so the product is more complex than the reactant
  4. 4. Decomposition Reactions• Break substances apart• Reaction in which one compound reaks into at least 2 products• AB -- A + B• 2H2O -- 2H2 + O2
  5. 5. Combustion Reactions• Use oxygen as a reactant• Oxygen is a reactant in EVERY combustion reaction
  6. 6. Single Displacement Reactions• Elements trade places• XA + B -- BA + X• Usually, a more reactive element takes the place of a less reactive element
  7. 7. Double-Displacement Reaction• Reaction in which a gas, solid precipitate, or a molecular compound is formed• Ions appear to be exchanged between compounds• AX + BY -- AY + BX
  8. 8. Electrons and Chemical Reactions• Classes of reactions (Synthesis, Decomposition, Combustion, Single- Displacement, Double Displacement) used by early chemist before atom was understood• Today, reactions can be classified by understanding the transfer of electrons
  9. 9. Redox Reactions• Reduction/Oxidation Reaction• A reaction that occurs when electrons are transferred from one reactant to another• Substances that accept electrons are reduced (gain e- reduces + charge)• Substances that give up electrons are oxidized
  10. 10. Summary• Synthesis reactions make larger molecules• Decomposition breaks compounds apart• In combustion reactions, substances react with oxygen• Elements appear to trade places in single-displacement reactions
  11. 11. Summary cont...• In double-displacement reactions, ions appear to move between compounds, resulting in a solid that settles out in solution, a gas that bubbles out of a solution, and/or a molecular substance• In redox reactions, electrons are transfer from one substance to another
  12. 12. Question 1• Classify each of the following reactions by type – A) S8 + 8O2 -- 8SO2 + heat – B) 6CO2 + 6H2O -- C6H12O6 + 6O2 – C) 2NaHCO3 -- Na2CO3 + H2O + CO2 – D) Zn + 2HCl -- ZnCl2 + H2
  13. 13. Question 2• Identify which element is oxidized and which element is reduced in the following reaction – Zn + CuSO4 -- ZnSO4 + Cu
  14. 14. Question 3• Compare and contrast single- displacement and double-displacement reactions based on the number of reactants.• Use the terms compound, atom, element, and ion.

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