If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?
Practice Questions
1 question
Q1
If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?
Rate is halved
Rate is doubled
Rate remains the same
Rate is quartered
In a first-order reaction, the rate is directly proportional to the concentration of the reactant. Halving the concentration will halve the rate.
Questions & Step-by-step Solutions
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Q
Q: If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?
Solution: In a first-order reaction, the rate is directly proportional to the concentration of the reactant. Halving the concentration will halve the rate.
Steps: 5
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.
