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If the concentration of the reactants is...

If the concentration of the reactants is increased, the rate of reaction for first order-

A

Remains unaffected

B

Increases

C

Decreases

D

May increase or decrease

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about how the rate of a first-order reaction is affected by an increase in the concentration of the reactants, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Definition of a First-Order Reaction**: A first-order reaction is characterized by a rate that is directly proportional to the concentration of one reactant. 2. **Write the Rate Law Expression**: For a first-order reaction involving reactant A, the rate law can be expressed as: \[ R = k[A]^1 \] where \( R \) is the rate of the reaction, \( k \) is the rate constant, and \([A]\) is the concentration of reactant A. 3. **Analyze the Relationship**: From the rate law, we can see that the rate \( R \) is directly proportional to the concentration of A. This means that if the concentration of A increases, the rate of the reaction will also increase. 4. **Conclusion**: Therefore, if the concentration of the reactants is increased, the rate of the first-order reaction will increase. The correct answer to the question is that the rate of reaction increases. ### Final Answer: The rate of reaction for a first-order reaction increases when the concentration of the reactants is increased. ---
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