Question

question 3
what is a reaction intermediate?
a substance that appears in the final product mixture.
a substance that makes the reaction go faster.
the same thing as an activated complex (transition state).
a substance that is produced by an early step and consumed in a later step.

Explanation:

A reaction intermediate is a short - lived substance formed in one step of a multi - step reaction mechanism and consumed in a subsequent step. It does not appear in the overall reaction equation and is different from a catalyst (which speeds up the reaction) and an activated complex (which is a high - energy, short - lived state during the reaction).

Answer:

A substance that is produced by an early step and consumed in a later step.