How is hard water from well converted to soft water? - Vidyadip

Question

How is hard water from well converted to soft water?

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Answer

and we come to know this from the lather formed on it.
The hardness of water is due to the presence of chlorides and sulphates of calcium and magnesium in it.
$Na_2CO_3$ is added to it to soften such water and make it suitable for use.
The reaction with $Na_2CO_3$ causes the formation of insoluble carbonate salts of magnesium and calcium.
Chemical reaction
$MgCl_{2(aq)} + Na_2CO_{3(s)}→ MgCO_{3(s)} + 2NaCl_{(s)}$ Magnesium Sodium Magnesium Sodium chloride carbonate carbonate chloride

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