In class we watched a demonstration where the color of the solution oscillated b

Question

In class we watched a demonstration where the color of the solution oscillated between orange and blue. This is a very complicated reaction with multiple pathways the reaction can take. One pathway can be described as follows: H_2 O_2 + 3 I^- + 2 H^+ rightarrow I_3^- + 2 H_2 O Step 1. H_2 O_2 + H^+ rightarrow H_3 O_2^+ step 2. H_3 O_2^+ + I^- rightarrow H_2 O + HOI stop 3. HOT + I^- rightarrow OH^- + I_2 step 4. OH^- + H^+ rightarrow H_2 O Step 5. I_2 + I^- rightarrow I_3^- How many of the following statements are correct based on the information given? Select all that are Correct. There are no catalysts in this reaction If step 2 is the rate determining step, and step 1 is a fast equilibrium step, this reaction would be third order over all The reaction is first order with respect to H_2 O_2 If step 1 were the rate determining step the order of the overall reaction would he second order

Explanation / Answer

Since two reagents participate in the step 1 to form an intermediate H3O2+ and it initiate the reaction and not involved in the reaction but speeds up so the reaction do not have external catalyst.also if step 1 were the rate determining step the order of the overall reaction would be second order.

Therefore 1st and last options are correct.

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