The most important way of neutralizing an acid and a base is to add them together
An acid + A base --> Salt + Water
An acid + A base --> Salt + Water
Another way to neutralize an acid is to make it react with a metal
Metal + Acid --> Salt + Hydrogen gas
Metal + Acid --> Salt + Hydrogen gas
A Third way to neutralize an acid is to make it react with a carbonate
Acid + Carbonate --> Salt + Water + Carbon Dioxide gas
Acid + Carbonate --> Salt + Water + Carbon Dioxide gas