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In the reaction mechanism below, indicate what substance is acting like a catalyst.

Step 1: H2O2 (aq) + I- (aq) → H2O (l) + IO- (aq)

Step 2: H2O2 (aq) + IO- (aq) → H2O (l) + I- (aq)

Is the catalyst in the problem above a heterogeneous or a homogeneous catalyst?

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  1. I think that step 2 is the catalyst which leads me to believe that it is homogeneous, am I correct?

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  2. Thanks.

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