10. The decomposition of hydrogen peroxide is given by the following reaction: 2 H2O2(aq) + 2 H20(1) + O2(g) In the presence of KI the reaction is thought to occur by the following mechanism: Step 1: H2O2 + H2O + 10- Step 2: 10- + H2O2 -> H2O + O2 + I- What is the role of I- in this mechanism? a) catalyst b) frequency factor c) intermediate d) transition state e) none of these

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Nestor RutherfordLv2

21 Jul 2018

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The mechanism for the reaction 2H2O2(aq) -> 2H2O (l) + O2(g) in the presence of I- (aq) is proposed to beStep 1: H2O2(aq) + I-(aq) -> H2O(l) + OI-(aq)Step 2: H2O2(aq) + OI-(aq) -> H2O(l) + O2(g) + I-(aq)Which of the following is a catalyst?OI-I-O2H2O

The decomposition of hydrogen peroxide can be catalyzed byiodide ion. The catalyzed reaction is thought to proceed by a twostep mechanism.

step 1 H₂O₂(aq) + I^-(aq) => H₂O(l) + IO^-(aq)

step 2 IO^-(aq) +H₂O₂(aq) => H₂O(l) +I^-(aq)

a. Write the rate law for each of the elementary processes ofthe mechanism.

b. Write the chemical equation for the overall reaction.

c. Identify the intermediate, if any, in the mechanism.

d. If the rate law is Rate= k [H₂O₂][I^-] which step is slow?