Which is an intermediate in this reaction mechanism: step 1: h2o2 + i- → h2o + oi- step 2: h2o2 + oi- → h2o + o2 + i- a. h2o2 b. i- c. oi- d. o2

Explanation:

An intermediate is defined as species which are produced in one step of a reaction and consumed in the other. It is important not to confuse an intermediate with a catalyst. Catalyst is consumed in one reaction and produced in one of the subsequent reactions.

Given the mechanism of this reaction, in the first step we produce . Notice that the same species, , is produced in the subsequent step 2. In this case, is the intermediate, as it follows the definition of an intermediate.

For your own information, iodide anion is a catalyst, as it's consumed in step 1 and reproduced in step 2.

1.solid

2.carbon dioxide

3.helium