4.6 Types of Chemical Reactions

• Combination reactions involve two or more reactants forming a single product.


  True
• What is produced when silver chloride is decomposed by light?

  Silver and chlorine
• Zinc can displace copper from copper sulfate in a single displacement reaction.


  True
• What type of energy is required for the decomposition of calcium carbonate into calcium oxide and carbon dioxide?

  Heat
• Steps for the reaction where zinc displaces copper from copper sulfate

  1️⃣ Zinc reacts with copper sulfate

  2️⃣ Zinc replaces copper

  3️⃣ Zinc sulfate and copper are formed
• What is the general formula for double displacement reactions?

  AB + CD → AD + CB
• Combustion reactions always involve oxygen as a reactant.


  True
• Combustion reactions are exothermic and release a large amount of heat and light.
• The reaction between sodium and chlorine to form sodium chloride is an example of a combination reaction.

  True
• Heat is an example of energy that can drive a decomposition
• The reactivity of elements is determined by the activity series.
• Decomposition reactions always require an input of energy.


  True
• The reactivity of elements determines if displacement occurs in single displacement reactions.


  True
• Elements higher in the activity series can displace elements below them.


  True
• A precipitate, gas, or water is often formed in double displacement reactions.
• Why are combustion reactions considered exothermic?

  They release energy
• What is the general formula for a combination reaction?

  A + B → AB
• The reaction between sodium and chlorine forms sodium chloride
• Decomposition reactions typically require an input of energy.


  True
• What is the general formula for a single displacement reaction?

  A + BX → AX + B
• Decomposition reactions can be represented by the general formula: AB → A + B
• What is the general formula for single displacement reactions?

  A + BX → AX + B
• Which precipitate is formed when silver nitrate reacts with sodium chloride?

  Silver chloride
• Match the characteristic of combustion reactions with its description:

  Reactants ↔️ Fuel and oxygen

  Products ↔️ Carbon dioxide and water

  Energy released ↔️ Heat and light
• What type of reactants are involved in combination reactions?

  Elements or compounds
• What is the general formula for a decomposition reaction?

  AB → A + B
• The decomposition of calcium carbonate into calcium oxide and carbon dioxide requires heat.


  True
• Match the reactants with the products in the reaction: Zn + CuSO₄ → ZnSO₄ + Cu

  Zn ↔️ ZnSO₄

  CuSO₄ ↔️ Cu
• In summary, decomposition reactions break down a compound using energy
• In the reaction between zinc and copper sulfate, zinc sulfate and copper are produced.
• Match the type of product formed in double displacement reactions with its description:

  Precipitate ↔️ Insoluble solid formed from solution

  Gas ↔️ Gaseous product formed

  Water ↔️ Liquid product formed
• What are the products of combustion reactions?

  Carbon dioxide and water