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  • From the rate expression for the following reactions determine their order of reaction and the dimensions of the rate constants.

4.1     From the rate expression for the following reactions determine their order of reaction and the dimensions of the rate constants.

         (ii)   H_{2}O_{2}(aq)+3I^{-}(aq)+2H^{+}\rightarrow 2H_{2}O(I)+I_{3}^{-}Rate=k\left [ H_{2}O_{2}\right ]\left [ I^{-} \right ]

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Given rate = k[H_{2}O_{2}][I^{-}]

therefore the order of the reaction is 2

Dimension of k = rate/[H_{2}O_{2}][I^{-}]

                         \\=mol\ L^{-1}\ s^{-1}/(mol\ L^{-1})(mol\ L^{-1})\\ =L\ mol^{-1}\ s^{-1}

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manish

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