Question

How is an acid prepared from a (a) non metal (b) salt? Give an equation for each.​

Answer 1

Acids are prepared from non-metals by their oxidation.

For example : Sulphur or phosphorus is oxidized by conc. Nitric acid to form sulphuric acid or phosphoric acid. S + 6HNO3 H2SO4 + 2H2O + 6NO2 P + 5HNO3 H3PO4 + H2O + 5NO2

Acids are prepared from salt by displacement reaction.

For example : Nitric acid is prepared by using H2SO4 and sodium chloride. NaCl + H2SO4 NaHSO4 + HNO3