AP Unit 4: Chemical Reactions

Front

What is the balanced equation for the combustion of zinc sulfide (ZnS)?

Back

2ZnS + 3O2 -> 2ZnO + 2SO2

Front

How do you calculate the theoretical yield of a product in a chemical reaction?

Back

Theoretical yield is calculated using stoichiometry based on the balanced chemical equation and the amount of limiting reactant.

Front

What is the definition of percent yield in a chemical reaction?

Back

Percent yield is the ratio of the actual yield to the theoretical yield, multiplied by 100.

Front

What is the balanced net ionic equation for the reaction between sodium carbonate and hydrochloric acid?

Back

CO3^2-(aq) + 2H+(aq) -> H2O(l) + CO2(g)

Front

What is the role of a titrant in a titration?

Back

A titrant is a solution of known concentration used to determine the concentration of an unknown solution.

Front

How do you determine the volume of titrant needed to reach the equivalence point in a titration?

Back

The volume of titrant needed can be calculated using the molarity and volume of the analyte solution.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one reactant breaks down into two or more products.

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules.

Front

What is the significance of the limiting reactant in a chemical reaction?

Back

The limiting reactant determines the maximum amount of product that can be formed in a reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.