AP Chemistry Unit 4 Review

Front

What is the percent yield in a chemical reaction?

Back

Percent yield is the ratio of the actual yield to the theoretical yield, multiplied by 100. It indicates the efficiency of a reaction.

Front

What happens to an atom that loses electrons during a chemical reaction?

Back

The atom is oxidized, meaning it has lost electrons and its oxidation state has increased.

Front

In the reaction Zn + H2O → ZnO2 + H2, which element is oxidized?

Back

Zinc is oxidized as it loses electrons.

Front

What is a net ionic equation?

Back

A net ionic equation shows only the species that participate in a reaction, omitting spectator ions.

Front

In the reaction Cl2 + 2HBr → 2HCl + Br2, which element is reduced?

Back

Chlorine is reduced as it gains electrons.

Front

Define oxidation in terms of electron transfer.

Back

Oxidation is the process of losing electrons, resulting in an increase in oxidation state.

Front

Define reduction in terms of electron transfer.

Back

Reduction is the process of gaining electrons, resulting in a decrease in oxidation state.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a reaction without being consumed, lowering the activation energy required.

Front

What is the difference between a strong acid and a weak acid?

Back

A strong acid completely dissociates in solution, while a weak acid only partially dissociates.

Front

What is the formula for calculating percent yield?

Back

Percent Yield = (Actual Yield / Theoretical Yield) × 100.