ChemistryHalf-life periods for a reaction at initial concentration of 0.1M and 0.01M are 5 and 50 minutes respectively. Then the order of reaction is

Half-life periods for a reaction at initial concentration of $0.1 M$ and $0.01 M$ are 5 and 50 minutes respectively. Then the order of reaction is

Solution:

When the initial concentration is reduced from $0.1 M$ to $0.01 M$ , the half-life period of the reaction increases from 5 minutes to 50 minutes.
Thus, when the initial concentration is reduced to one-tenth, the half-life period becomes 10 times.
Hence, the half-life period is inversely proportional to the initial concentration
$(t_{1 / 2} \propto \frac{1}{A})$
This is true for the second-order reaction.

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