In Cation-Exchange Resins, What Ion Replaces Ca²⁺ and Mg²⁺ in the Hard

question 90

Multiple Choice

In cation-exchange resins, what ion replaces Ca²⁺ and Mg²⁺ in the hard water that is passed over the resin?

• A) Ba²⁺
• B) K⁺
• C) Li⁺
• D) Na⁺
• E) H⁺

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