How salts are made

Table salt (NaCl) is a salt, and so are the mixtures in oral rehydration salts and saline.

Acids react with bases to make salts.

Acid + base	Salt made
Hydrochloric acid + sodium hydroxide	Sodium chloride
Hydrochloric acid + potassium hydroxide	Potassium chloride
Nitric acid + magnesium hydroxide	Magnesium nitrate

NaOH (aq) + HCl (aq) → NaCl (aq) + H₂O (l)

KOH (aq) + HCl (aq) → KCl (aq) + H₂O (l)

Mg(OH)₂ (s) + 2HNO₃ (aq) → Mg(NO₃)₂ (aq) + 2H₂O (l)