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Water solutions of several salts:

Red: Cobalt(II) Nitrate (Co(NO3)2)

Orange: Potassium Dichromate (K2Cr2O7)

Yellow: Potassium Chromate (K2CrO4)

Cyan: Nickel(II) Chloride (NiCl2)

Blue: Copper Sulphate (CuSO4)

Purple: Potassium Permanganate (KMnO4)

A salt in chemistry is a compound of at least one metal and one non-metal. The salt that is sprinkled on food is sodium chloride (NaCl), which consists of a crystal of an equal number of sodium and chlorine atoms. «No Salt» is potassium chloride (KCl), which consists of a crystal of an equal number of potassium and chlorine atoms.

Acid-Base reactions[edit]

Acids form the following salts when reacting to a base:

Acid name Salt name
Hydrochloric acid Chlorides
Sulphuric acid Sulphates
Nitric acid Nitrates

An example of this would be Hydrochloric acid reacting with Sodium Hydroxide to form Sodium Chloride.


See if you can work out which salts are made in the test below.


Sulphuric acid + Sodium Hydroxide

Sodium Hydroxide
Sodium Sulphate
Neutralization of substances


Sulphuric acid + Iron Hydroxide

Ferrous Sulphate
Ferrous Nitrate
Ferrous Hydroxide


Sulphuric acid + Copper Hydroxide

Copper Sulphate
Copper Nitrate
Copper Chloride


Hydrochloric acid + Lithium Hydroxide

Lithium Sulphate
Lithium Chloride
Lithium Hydrochloride


Hydrochloric acid + Calcium Hydroxide

Calcium Chloride
Calcium Nitrate
Calcium Sulphate


Sulphuric acid + Strontium Hydroxide

Strontium Hydroxide
Strontium Sulphate
Strontium Chloride


Nitric acid + Iron Hydroxide

Ferrous Nitrate
Ferrous Chloride
Ferrous Sulphate