alleryStart learning →What happens to a catalyst by the end of the reaction it speeds up?
AIt is converted into one of the products
BIt is used up in the very first step
CIt becomes part of the main intermediate
DIt is regenerated in the course of it
Answer & Solution
Correct answer: D. It is regenerated in the course of it
1. A catalyst lowers the activation energy and so raises the rate.
2. It may well be changed part way through the mechanism.
3. But a later step gives it back unchanged, so it is regenerated.
4. This is why a small amount of catalyst can serve a large amount of reactant.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.7 Catalysis_
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