Question

difference between temporary hard water and permanent hard water

Answer 1

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).

Answer 2

Explanation:

Temporary hardness is the hardness caused by bicarbonates of calcium and magnesium. It is called as temporary hardness as it can be easily removed using simple methods.

$Ca(HCO_3)_2$ and $Mg(HCO_3)_2$ are Temporary hardness causing salts.

Permanent hardness is the hardness caused by chlorides and sulfates of calcium and magnesium. It is called as permanent hardness as it only be removed using chemical methods.$CaSO_4$ , $CaCl_2$ , $MgSO_4$ and $MgCl_2$ are permanent hardness causing salts.

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