Q. Temporary hardness in water is caused by
Solution:
- Hard water contains dissolved magnesium and calcium ions.
- These make it more difficult for the water to form a lather with soap.
- Temporary hardness is caused by dissolved bicarbonate minerals (calcium bicarbonates and magnesium bicarbonates) which can be removed by boiling.
- Permanent hardness is caused by dissolved chlorides, nitrates and sulphates of calcium and magnesium(which is not removed by boiling).
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