GCSE CHEMISTRY - Salts made from an Acid and an Alkali - Neutralisation

Neutralisation.

An acid plus an alkali makes a salt plus water.

This is the balanced chemical equation for the reaction of
hydrochloric acid and sodium hydroxide.

hydrochloric acid + sodium hydroxide sodium chloride + water.
HCl_(aq) + NaOH_(aq) NaCl_(aq) + H₂O_(l)

This is the balanced chemical equation for the reaction of
sulfuric acid and potassium hydroxide.

sulfuric acid + potassium hydroxide potassium sulfate + water.
H₂SO₄_(aq) + 2KOH_(aq) K₂SO₄_(aq) + 2H₂O_(l)

When ammonia is used as the alkali,
ammonium hydroxide is formed in solution.

This is the balanced chemical equation for the reaction of
sulfuric acid and ammonium hydroxide.

sulfuric acid + ammonium hydroxide ammonium sulfate + water.
H₂SO₄_(aq) + 2NH₄OH_(aq) (NH₄)₂SO₄_(aq) + 2H₂O_(l)

The salt formed here is ammonium sulfate.
Ammonium salts are used as fertilisers.

All of the salts made above are soluble.
Pure samples of the salt can be made by using a titration.