Disscuss permanent hardness and temporary hardness of water?
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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 calcium hydrogencarbonate (which is removed by boiling). Permanent hardness is caused by dissolved calcium sulfate (which is not removed by boiling).
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temporary hardness is formed by dissolved calcium ( hydrogencarbonate) ( which remove from boiling )
permanent hardness is formed by dissolved calcium sulphate ( which is not remove from boliling
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