Consider the decomposition of hydrogen peroxide in alkaline medium which is catalysed by iodide ions. 2H_(2)O_(2) overset(OH^(-)) to 2H_(2)O+O_(2) The This reaction takes place in two steps as given below: Step I H_(2)O_(2)+I^(-) to H_(2)O+IO^(-) (slow) Step IIH_(2)O_(2) +IO^(-) to H_(2)O +I^(-) +O_(2) (fast) (a) Writethe rate expression and determine the order of reaction wrt H_(2)O_(2). (b) What is the molecularity of each individual step?

Consider the decomposition of hydrogen peroxide in alkaline medium whi

1.	Consider the decomposition of hydrogen peroxide in alkaline medium which is catalysed by iodide ions. 2H_(2)O_(2) overset(OH^(-)) to 2H_(2)O+O_(2) The This reaction takes place in two steps as given below: Step I H_(2)O_(2)+I^(-) to H_(2)O+IO^(-) (slow) Step IIH_(2)O_(2) +IO^(-) to H_(2)O +I^(-) +O_(2) (fast) (a) Writethe rate expression and determine the order of reaction wrt H_(2)O_(2). (b) What is the molecularity of each individual step?
Answer» Solution :(a)Rate `=k[H_(2)O][IO^(-)]` As, there is one molecule of `H_(2)O_(2)` involved in the SLOW step, ORDER of the reaction WRT `H_(2)O_(2)`is 1. (B) Molecularity of step `I=2`. Molecularity of step `II =2.`