What is the term for a substance that speeds up a reaction without being permanently changed?

Question

Quizplus · Accepted Answer

A catalyst is a substance that speeds up a reaction without being permanently changed. It lowers the activation energy required for a reaction to occur, allowing it to proceed more quickly. Accelerators can also speed up reactions, but they are typically substances that are consumed in the reaction and are not present in the final product. Inhibitors, on the other hand, slow down reactions by blocking or reducing the activity of catalysts or reactants. Reactants are the starting materials in a chemical reaction that are transformed into products.

What Is the Term for a Substance That Speeds Up