Answer:
D. Catalysts speed up the rate of reactions by lowering the amount of energy required for the reaction to proceed.
Explanation:
A catalyst is a substance that:
- speeds up the rate of a reaction .
- does not alter the products of the reaction .
- is unchanged chemically and in mass at the end of the reaction.
A catalyst provides an alternative reaction pathway that has a lower activation energy than the uncatalyzed reaction.
The figure shows how the energy of the reactants and products change during a reaction.
