Neutralising Acids

A base is a compound that can neutralise an acid. The reaction is called neutralisation.
After neutralisation there is no acid left. A neutral solution has a pH of 7.
All acids and bases react to form the same type of products.
Acid + Base = Salt + Water
If you neutralise and acid using a carbonate, carbon dioxide is produced.
Acid + Carbonate = Salt + Water + Carbon Dioxide
Bases are compounds of metals - either metal oxides (e.g. calcium oxide) or metal hydroxides (e.g. potassium hydroxide) or metal carbonates (e.g. sodium carbonate).
Not all bases will dissolve to make solutions.
Bases that are soluble are called alkali's (e.g sodium hydroxide).
Hydrochloric acid (HCl) is made naturally in our stomachs. It is important for killing bacteria and for activating some enzymes for digestion.
1. Too much stomach acid can cause indigestion.
Antacids relieve indigestion. They work by neutralising excess stomach acid.

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