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

Practice Questions

Q1
If the concentration of a reactant is halved in a first-order reaction, what happens to the rate?
  1. Rate is halved
  2. Rate is doubled
  3. Rate remains the same
  4. Rate is quartered

Questions & Step-by-Step Solutions

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.
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