Question

Difference bet. temporary and permanent hardness of water

Answer 1

Dear Student,

Difference between temporary and permanent hardness are :
Temporary hardness :

• It is due to the presence of bicarbonates of calcium and magnesium.
• It can be removed by boiling.
• Hardness removal is cheap.

Permanent hardness:

• It is due to the presence of chlorides or sulphates of calcium and magnesium.
• It cannot be removed by boiling.
• Removal of this hardness is expensive.