What is Salt?

Salts: Replacing the Hydrogen of Acids

A salt is the substance formed when the hydrogen ion(H+) of an acid is partly or completely

replaced by a metal or ammonium.

All salts are ionic compound.

Solubility of Salt

Solubility is the ability of water to dissolve a substain in a solvent (normally water).

Salt Solubility

Salt of potassium, sodium and ammonium

All soluble in water

Salt of nitrate All soluble in water

Salt of sulphate

Mostly soluble in water except:

(Pb) Lead sulphate

(Ba) Barium sulphate

(Ca) Calcium sulphate

Salt of chloride

Mostly soluble in water except: 

(Pb) Lead chloride

(Ag) silver chloride

(Hg) mercury chloride

Salt of carbonate

Mostly insoluble in water except: 

Potassium carbonate

Sodium carbonate

Ammonium carbonate

Preparation of Soluble Salts

If you still remember, in previous chapter (Acid and Base), we have learned that there are 4 important

reactions for all acids:

(1) Acid + Metal ---> Salt + Hydrogen gas

(2) Acid + Metal Carbonate ---> Salt + Water + Carbon Dioxide gas

(3) Acid + Metal Oxide ---> Salt + Water

(4) Acid + Metal Hydroxide ---> Salt + Water.