Grade Upto college level Physical Chemistry
what cause the temporary and permanent hardness of water?
2 Answers
Aarti Gupta
Hard water does not form lather with soaps as a result of which effectiveness of water for washing purposes get reduced.The two types of hardness are caused by-
1. Temporary Hardness- Caused by the presence of bicarbonates of Ca2+ and Mg2+ ions.
2.Permanent Hardness- Caused by the presence of soluble calcium or magnesium salts other than bicarbonates.
1. Temporary Hardness- Caused by the presence of bicarbonates of Ca2+ and Mg2+ ions.
2.Permanent Hardness- Caused by the presence of soluble calcium or magnesium salts other than bicarbonates.
Subhakanta Dash
There are basically two type of hardness of water i.e temporary hardness and permanent hardness
1.Temporary Hardness- It is caused due to the prescenceof bicarbonates of calcium and magnessium i.e Ca(HCO3)2 AND Mg(HCO3)2 .It is also called carbonate hardness . It can be removed by boiling and filtering the water.
2.Permanent Hardness- It is caused due to the presence of soluble chlorides and sulphates i.e CaCl2 ,MgCl2 ,MgSO2 ,CaSO4 . It is also called non carbonate hardness
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