Define salt and describe three types, of salts with examples | web4study

Define salt and describe three types, of salts with examples



Salt is an ionic compound produced when an acid is neutralized by a base. For example, sodium hydroxide neutralizes hydrochloric acid to form sodium chloride (salt) and water.

NaOH(aq) + HCl(aq) –> NaCl(aq) + H20(1)

Similarly potassium hydroxide neutralizes nitric acid to form potassium nitrate and water.

KOH(aq) + HCl(aq) –> KN03(aq) + H2O(1)

On the basis of their chemical nature, salts can be divided into three groups.

(1) Normal Salts (2) Acidic Salts (3) Basic Salts

 

(1) Normal Salts:

Salts which are formed by the complete neutralization of an acid by a base e.g. NaCl, NaN03, K2S04 etc are normal salts. These salts do not have replaceable hydrogen atoms or hydroxyl groups.

 

(2) Acidic Salts:

Salts which are formed by the partial neutralization of an acid by a base e.g. NaHS04, KHC03, etc are acidic salts.

NaOH(aq) + H2S04(aq) –> NaHS04(aq) + H20(1)

KOH(aq) + H2C03(aq) –> KHC03(aq) + H20(1)

These salts contain replaceable hydrogen ion. They react further with bases to form normal salts. 

 

(3) Basic Salts:

Salts, which are formed by the partial neutralization of a base by acid, e.g. Mg (OH) Cl, Zn(OH)CI, etc are basic salts.

Mg(OH)i + HCl(aq) –> Mg(OH)CI + H20(1)

These salts have replaceable hydroxyl groups. They can further react with acids to form normal salts.


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