If the concentration of a reactant is halved in a first-order reaction, what hap

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Question: If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?

Options:

Correct Answer: Rate is halved

Solution:

In a first-order reaction, the rate is directly proportional to the concentration of the reactant. Halving the concentration will halve the rate.

If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?

If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?

Step 1: Understand that a first-order reaction means the rate depends on the concentration of one reactant.
Step 2: Know that if you change the concentration of the reactant, the rate will change in a specific way.
Step 3: If you halve the concentration of the reactant, you are reducing it to half of its original amount.
Step 4: Since the rate is directly proportional to the concentration, halving the concentration will also halve the rate of the reaction.
Step 5: Conclude that the new rate will be half of the original rate.

First-Order Reaction Kinetics – In a first-order reaction, the rate of reaction is directly proportional to the concentration of the reactant.