Exam Review Tests 20, 21 and 2 + ch. 21 vocab

Front

Each substance on the left side of a chemical equation is a ____________.

Back

reactant

Front

If heat is needed for a chemical reaction, it is ________.

Back

endothermic

Front

Reaction: NH₃ + HCl → NH₄Cl

Back

synthesis

Front

Decomposition reaction:

Back

compound = element + element

Front

Symbol for 'dissolved in water' in a chemical equation:

Back

(aq)

Front

When one element replaces another in a compound, the reaction is a _________ reaction.

Back

single-displacement

Front

A substance that speeds up a chemical reaction without being permanently changed is a(n) ______.

Back

catalyst

Front

Breaking down a substance into simpler substances.

Back

decomposition

Front

Substances to the right of the arrow in a chemical equation are:

Back

product

Front

Substances that slow down chemical reactions are called

Back

inhibitors