Question

what happens to a catalyst after a chemical reaction is completed?
a. it is consumed and turned into products.
b. it remains unchanged and can be reused.
c. it combines with reactants to form new compounds.
d. it evaporates.

Explanation:

A catalyst is a substance that speeds up a chemical reaction without being consumed in the reaction. After the reaction is completed, it remains chemically unchanged and can be used again in subsequent reactions.

Answer:

B. It remains unchanged and can be reused.