What is the pH of a salt solution
pH of Salts :
The aqueous solutions of all kinds of salts do not have the same pH value.
(i) Salts of strong acids and strong bases : Sodium chloride (NaCl), potassium nitrate (KNO3), sodium sulphate (Na2SO4), etc., are salts of this category. The aqueous solutions of these salts are neutral with pH value of 7.
(ii) Salts of strong acids and weak bases : Aluminium chloride (AlCl3), copper sulphate (CuSO4), zinc sulphate (ZnSO4), etc., are salts of this category. The aqueous solutions of these salts are acidic with pH value less than 7.
(iii) Salts of weak acids and strong bases : Sodium acetate (CH3COONa), sodium carbonate (Na2CO3) and sodium hydrogencarbonate (NaHCO3) are examples of this category of salts. The aqueous solutions of these salts are basic in nature with pH value more than 7.
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