Problem: The reaction A → products has a rate constant of 0.15 mol/(L s). If the concentration of A is cut in half, the half-life of the reaction willA) decrease by a factor of 1/2.B) double.C) decrease by a factor of 1/4.D) remain constant.E) quadruple.

FREE Expert Solution

We’re being asked to determine what would happen to the half-life of the reaction if the concentration of A is cut in half.

 A → products       k = 0.15 mol/(L•S)


We're going to determine the change in half-life using the following steps:

Step 1: Determine the order of the reaction using the rate constant.
Step 2: Determine the change in half-life.

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Problem Details

The reaction A → products has a rate constant of 0.15 mol/(L s). If the concentration of A is cut in half, the half-life of the reaction will

A) decrease by a factor of 1/2.

B) double.

C) decrease by a factor of 1/4.

D) remain constant.

E) quadruple.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Integrated Rate Law concept. You can view video lessons to learn Integrated Rate Law. Or if you need more Integrated Rate Law practice, you can also practice Integrated Rate Law practice problems.