catalyst speeds up chemical change
A catalyst.
catalyst
speeds it up or starts it
A substance that speeds up a chemical reaction without undergoing a permanent change itself is a catalyst.
Catalyst
A catalyst which in biology is called an enzyme.
A substance that speeds up a chemical reaction is known as a CATALYST.
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.
There are five organs in our body that secrete digestive juices, which contain enzymes to speed up the rate of chemical change. These are the mouth, stomach, pancreas, liver and gall bladder.
Hydrochloric acid
Catalyst
catalysts