The answer is catalyst
A substance that undergoes change in a chemical reaction is called a reactant.
It is called a reactant. While catalysts participate in reaction dynamics, they are not permanently changed in the process.
Catalyst: a substance which speeds up a chemical change or enables the change to take place at a lower tempature, and is not changed or used up in the reaction.
chemical reaction is when a substance is changed chemicaly but not physicaly
if at the end of the chemical THAT substance is unchanged .That substance is a catalyst. If it slows donw the reaction, it is called an inhibitor.
This chemical process is called synthesis.
This chemical process is called hydration.
A change from one or more substances to another is a chemical change.
Chemical reaction
The processes are called chemical reactions.
Chemical Property
These are called catalysts.