In a reaction, if the concentration of reactants is doubled, what happens to the

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Question: In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if it is first order? (2023)

Options:

Correct Answer: Doubles

Exam Year: 2023

Solution:

For a first-order reaction, the rate is directly proportional to the concentration of the reactant, so doubling the concentration doubles the rate.

In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if it is first order? (2023)

In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if it is first order? (2023)

Step 1: Understand what a first-order reaction means. In a first-order reaction, the rate of the reaction depends on the concentration of one reactant.
Step 2: Know that 'rate' refers to how fast the reaction occurs.
Step 3: Recognize that if you double the concentration of the reactant, you are increasing the amount of reactant available for the reaction.
Step 4: Since the rate is directly proportional to the concentration in a first-order reaction, if you double the concentration, the rate will also double.
Step 5: Conclude that if the concentration of reactants is doubled, the rate of reaction will also double.

First-Order Reaction – In a first-order reaction, the rate of reaction is directly proportional to the concentration of one reactant.
Rate Law – The mathematical relationship between the rate of a reaction and the concentration of reactants.