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what cause the temporary and permanent hardness of water?

what cause the temporary and permanent hardness of water?

Grade:Upto college level

2 Answers

Aarti Gupta
askIITians Faculty 300 Points
7 years ago
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.
Subhakanta Dash
15 Points
3 years ago
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 CaCl,MgCl2 ,MgSO,CaSO4 . It is also called non carbonate hardness 

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