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Question
From the rate expression for the following reaction, determine the order of reaction and the dimension of the rate constant.
\[\ce{H2O2_{( aq)} + 3I^-_{( aq)} + 2H^+ -> 2H2O_{(l)} + I^-_3}\] Rate = k[H2O2][I−]
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Solution
Given rate = k[H2O2][I−]
∴ Order of the reaction = 2
Dimension of k = \[\ce{\frac{Rate}{[H2O2] [I-]}}\]
= \[\ce{\frac{(mol L^{-1} s^{-1})}{(mol L^{-1})(mol L^{-1})}}\]
= L mol−1 s−1
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