The reaction X →Y is first-order overall and first-order with respect ot the reactant X. The result of doubling the initial concentration of X will be to

The reaction X →Y is first-order overall and first-order with respect to the reactant X. The result of doubling the initial concentration of X will be to

A ) double the initial rate.

B) decrease the rate constant of the reaction.

C) shorten the time taken to reach equilibrium.

D) shorten the half-life of the reaction.

E) increase the rate constant of the reaction.

Solution:

First-order with respect to X means that the exponent of [X] in the rate law is 1. This gives the rate law:

Rate=k[X]

This means the rate changes proportionally to the concentration of X. If the concentration of X doubles, the initial rate will also double.

Thus, Choice 1 is correct.

Need help with your chemistry class? Our Online Chemistry Tutor is ready to help you!

Learn more with our sister website Learn With Mayya