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Question
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is reduced to half?
Solution
Rate of reaction, R = k [A]2
If [A] = `1/2`R, rate = `"k"("R"/2)^2`
= `1/4`kR2
i.e. rate becomes `1/4`th when concentration is reduced to `1/2`.
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