Multiple choice

When cation exchange resin is treated with hard water, the hardness causing ions get exchanged with

  1. H+ ions

  2. Ca2+ ions

  3. SO42- ions

  4. Mg2+ ions
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

this option is correct because when cation exchange resin is first treated with carboxylic acid it becomes capable of donating its hydrogen ions and when comes in contact with the hardness causing cations it exchanges is H+ ions with the hardness producing cation.

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