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  • Which metal salt is used to soften hard water?Option: 1 <img alt="\mathrm{NaHCO}_3 \\" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm

Which metal salt is used to soften hard water?

Option: 1

\mathrm{NaHCO}_3 \\


Option: 2

\mathrm{Na}_2 \mathrm{CO}_3 \\


Option: 3

\mathrm{NaCl} \\


Option: 4

\mathrm{Na}_2 \mathrm{SO}_4


Answers (1)

best_answer

Na_{2}CO_{3} is used for softening hard water which contains salts of Mg and Ca and they are removed by metal exchange reaction with Na_{2}CO_{3}.

 

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