A substance that speeds up a chemical reaction is known as a CATALYST.
This could refer to a chemical transformation (chemical change), a chemical reaction, or spontaneous change. Some changes require another substance or substances to be mixed together. Some reactions will occur by themselves without any outside manipulation or stimulation.
A reaction inhibitor refers to a substance that decreases the rate of, or prevents, a chemical reaction. Two chemical processes for which inhibitors would be desirable are in food preservation and cleaning metal oxides.
Any cheese, including moldy, is not a reaction. it is a (complex mixture of various) substance(s), it isn't even a molecular compound so you can give it neither a chemical name nor formula!
Another name of chemical change is a "chemical reaction".
Neutralization always produces water, H2O (the 2 is actually a sub-script).
Catalyst
A catalyst is a chemical that facilitates a chemical reaction between two other chemicals without being consumed in the reaction itself.
a product
a product
a product
A Product
This substance is called catalyst; and in living systems it is an enzyme.
Products are formed from chemical reactions.
A Product
a reactant
The substances formed in a chemical reaction are called products
The substance that slows down a chemical reaction is an inhibitor. Instead you could also call an inhibitor an anticatalyst.-anticatalyst `antee'katlist1. (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst