For the reaction A+B→C+D, doubling the concentration of both the reactants increases the reaction rate 8 times an ddoubling the concentration of only B simply dubles the reaction rate. Find the rate law for the above equation.
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Solution
A+B→C+D Rate1=K[A]m[B]n When [B] is doubled Rate2=k[A]m[B]n 2nkRate1n=1 Rate2=2Rate1 Rate3=k[2A]m[2B]1 Rate3=2m×2k[A][B] Rate3=8Rate1 So Rate law =k[A]2[B]