Chemical Reactions

What is a decomposition reaction?

• A decomposition reaction is a type of chemical reaction where a compound remains unchanged.

• A decomposition reaction is a type of chemical reaction where two compounds combine to form a single substance.

• A decomposition reaction is a type of chemical reaction where energy is released.

• A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.

Provide an example of a single replacement reaction.

• 2Na(s) + Cl2(g) -> 2NaCl(s)

• Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g)

• Fe(s) + CuSO4(aq) -> FeSO4(aq) + Cu(s)

• 2H2(g) + O2(g) -> 2H2O(l)

Explain the process of a double replacement reaction.

• In a double replacement reaction, only one new compound is formed.

• Double replacement reactions involve the exchange of electrons between two ionic compounds.

• The process of a double replacement reaction results in the formation of a gas.

• The process of a double replacement reaction involves the exchange of ions between two ionic compounds to form two new compounds.

What are combustion reactions and what do they usually involve?

• Combustion reactions involve mixing two liquids, resulting in a solid product.

• Combustion reactions typically require no heat to occur.

• Combustion reactions involve a fuel and an oxidizing agent reacting to produce heat, light, and new chemical products.

• Combustion reactions usually involve the production of water and carbon dioxide.

Define redox reactions and give an example.

• Redox reactions involve the transfer of energy between reactants. An example is the reaction between water and carbon dioxide to form glucose.

• Redox reactions involve the transfer of electrons between reactants. An example is the reaction between iron and oxygen to form rust.

• Redox reactions involve the transfer of protons between reactants. An example is the reaction between sodium and chlorine to form table salt.

• Redox reactions involve the transfer of neutrons between reactants. An example is the reaction between copper and sulfur to form copper sulfate.

In a decomposition reaction, what happens to the reactant?

• The reactant evaporates completely

• The reactant remains unchanged

• The reactant combines with another substance

• The reactant breaks down into two or more simpler substances.

How can you identify a single replacement reaction?

• Identify a double replacement reaction instead.

• Look for a single element reacting with a compound to form a new compound and a different element.

• Look for two compounds reacting to form two new compounds.

• Observe a compound breaking down into two different elements.

What are the products of a double replacement reaction?

• Two new compounds

• No new compounds

• One new compound

• Three new compounds

What are the common fuels used in combustion reactions?

• solar energy

• propane

• gasoline, natural gas, coal, wood

• diesel

How are redox reactions different from other types of reactions?

• Redox reactions involve only solids, while other reactions involve only liquids.

• Redox reactions always produce heat, while other reactions do not.

• Redox reactions occur only in living organisms, while other reactions occur in non-living systems.

• Redox reactions involve electron transfer, while other reactions do not.