Which species is an intermediate? Which species is a catalyst?

Expert Solution

An intermediate is a species that is formed during the reaction and disappears before the end.

Whereas catalyst is a species present at the beginning of the reaction and reappears at the end and it does not appear in the final equation.

For example let us consider the reaction between O₃ and O to form O₂.

Step 1: Cl + O₃ ClO + O₂

Step 2: ClO + O Cl + O₂

Final reaction: O₃ + O 2O₂

Here Cl is present in the beginning of reaction and reappears in the end and is not involved in the final reaction. Thus Cl is a catyst.

ClO is the intermediate here as it is formed during the reaction and disappeard at the end.

queen_honey_blossom answered 2 years ago

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