What substance increases the rate of a reaction but is not itself changed by the reaction?

Answer 1

It's called a catalyst. A catalyst is present during a chemical reaction but does not participate as a reactant or product. A catalyst lowers the reaction's activation energy, making the reaction easier to happen. In the equation for a chemical reaction, the catalyst's formula appears in small notation above the "yield" arrow (format won't let me show you an example.) An example of a catalyst is potassium iodide (KI) speeding up the decomposition of hydrogen peroxide (H2O2).

Answer 2

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the reaction. It works by providing an alternative pathway with lower activation energy for the reaction to occur, thus speeding up the reaction without being permanently altered itself.

Answer 3

A catalyst increases the rate if a reaction but is not changed in the reaction. In biological systems these are called enzymes.

Answer 4

This is called a catalyst. A catalyst lowers, or can raise, the activation energy. This change can make the reaction occur faster, but the catalyst is not consumed in the reaction.

Answer 5

These substances are called catalysts.

Answer 6

That is what you would call a catalyst.

Answer 7

positive catalyst

Answer 8

a catalyst

Answer 9

Catalyst

Answer 10

A catalyst.