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  • Hard water when passed through ion - exchange resin containing R-COOH groups becomes free from:Option: 1 <img alt="\mathrm{\mathrm{Cl}^{-}\, \, \&amp

Hard water when passed through ion - exchange resin containing R-COOH groups becomes free from:

Option: 1

\mathrm{\mathrm{Cl}^{-}\, \, \&\, \, \mathrm{SO}_4^{-2} \ ions}


Option: 2

\mathrm{\mathrm{CO}_3{ }^{-2} \, \, \& \, \, \mathrm{HCO}_3^{-}\ ions}


Option: 3

\mathrm{\mathrm{H}_3 \mathrm{O}^{+}\ ions}


Option: 4

\mathrm{\mathrm{Ca}^{+2} \, \, \& \, \, \mathrm{Mg}^{+2}\ ions}


Answers (1)

best_answer

Hard water is the water that contains salts of calcium and magnesium such as bicarbonates, chlorides, and sulfates. When it is passed through ion-exchange resin containing -\mathrm{COOH} group, it replaces \mathrm{Ca}^{+2}\, \, \& \, \, \mathrm{Mg}^{+2} ions present in hard water with \mathrm{H}^{+}ions.

Posted by

Sanket Gandhi

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