Question

The method used to remove temporary hardness of water is calgon`s method

Answer 1

Answer:

Clark's method is used to remove temporary  hardness of water, in which bicarbonates of  calcium and magnesium are reacted with  slaked lime $Ca(OH)_2$

$Ca(HCO_3)_2 + Ca(OH)_2$  → $2CaCO_3$ ↓ $+ 2H_2O$

$Mg(HCO_3)_2 + 2Ca(OH)_2$ → $2Ca(OH)_3$ ↓ $+ Mg(OH)_2$ ↓ $+ 2H_2O$

Answer 2

Explanation:

Clark's method is used to remove temporary hardness of water, in which bicarbonates of calcium and magnesium are reacted with slaked lime Ca(OH)_2Ca(OH)

2

Ca(HCO_3)_2 + Ca(OH)_2Ca(HCO

3

)

2

+Ca(OH)

2

→ 2CaCO_32CaCO

3

↓ + 2H_2O+2H

2

O

Mg(HCO_3)_2 + 2Ca(OH)_2Mg(HCO

3

)

2

+2Ca(OH)

2

→ 2Ca(OH)_32Ca(OH)

3

↓ + Mg(OH)_2+Mg(OH)

2

↓ + 2H_2O+2H

2

O