In a first-order reaction, if the half-life is 10 minutes, what will be the half

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Question: In a first-order reaction, if the half-life is 10 minutes, what will be the half-life after the concentration is halved?

Options:

Correct Answer: 10 minutes

Solution:

The half-life of a first-order reaction is constant and does not depend on the concentration; it remains 10 minutes.

In a first-order reaction, if the half-life is 10 minutes, what will be the half-life after the concentration is halved?

In a first-order reaction, if the half-life is 10 minutes, what will be the half-life after the concentration is halved?

Step 1: Understand what a first-order reaction is. In a first-order reaction, the rate of the reaction depends on the concentration of one reactant.
Step 2: Learn about half-life. The half-life is the time it takes for the concentration of a reactant to decrease to half of its initial value.
Step 3: Note that in a first-order reaction, the half-life is constant. This means it does not change even if the concentration changes.
Step 4: Since the problem states that the half-life is 10 minutes, this value will remain the same regardless of the concentration.
Step 5: Conclude that after the concentration is halved, the half-life will still be 10 minutes.

First-Order Reactions – In first-order reactions, the rate of reaction is directly proportional to the concentration of one reactant, and the half-life is constant regardless of concentration.
Half-Life – The half-life is the time required for the concentration of a reactant to decrease to half its initial value, which remains unchanged in first-order kinetics.