For a reaction with rate = k[A] 2 [B], what happens to the rate if the concentration of both A and B are doubled?

The rate increases by a factor of 2

The rate increases by a factor of 4

The rate increases by a factor of 6

For a reaction with rate = k[A] 2 [B],…

Answer: The rate increases by a factor of 8.

A The rate increases by a factor of 2
B The rate increases by a factor of 4
C The rate increases by a factor of 6
D The rate increases by a factor of 8

Correct answer: D. The rate increases by a factor of 8

Explanation: Rate is proportional to [A]<sup>2</sup>[B]; doubling both gives (2)<sup>2</sup> x (2) = 8 times the original rate.

First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.

Concept context

Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.

Read the full Chemical Kinetics notes →

For a reaction with rate = k[A]<sup>2</sup>[B], what happens to the rate if the concentration of both A and B are doubled?

Concept context

More Chemical Kinetics questions