Essential Chemistry for IGCSE - Rate Of Reaction (Section 2 - No. 46)
If the rate of a reaction is first order, what will happen if the concentration of the reactant is halved?
The rate of the reaction will double.
The rate of the reaction will halve.
The rate of the reaction will remain the same.
The rate of the reaction will be four times lower.
Explanation
For a first-order reaction, halving the reactant concentration will also halve the rate.
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