AP Chemistry Unit 5 Review

Front

What does a linear graph of ln(concentration) versus time indicate about the order of a reaction?

Back

The reaction is first order.

Front

If the reaction rate increases by a factor of 4 when the concentration of reactant A is increased by a factor of 2, what is the order of the reaction with respect to A?

Back

The reaction is second order with respect to A.

Front

How are the exponents n and m in the rate law determined?

Back

By experiment.

Front

Given the rate law rate = k[A][B]², which statement is false?

Back

The reaction is second order overall.

Front

What is the rate constant in the rate law rate = k[A] if k = 0.5 1/s and the initial concentration of A is 0.1 M?

Back

The rate constant is 0.5 1/s.

Front

How long will it take for [A] to drop from 0.1 M to 0.025 M if rate = k[A] with k = 0.5 1/s?

Back

It will take 2.8 s.

Front

What is the definition of a first-order reaction?

Back

A reaction whose rate is directly proportional to the concentration of one reactant.

Front

What is the definition of a second-order reaction?

Back

A reaction whose rate is proportional to the square of the concentration of one reactant or the product of the concentrations of two reactants.

Front

What is the significance of the rate constant (k) in a rate law?

Back

It indicates the speed of the reaction and is specific to the reaction at a given temperature.

Front

What is the relationship between reaction order and the units of the rate constant (k)?

Back

The units of k depend on the overall order of the reaction.