Which of the Following Is the Best Explanation for How

question 73

Multiple Choice

Which of the following is the best explanation for how a water softener works?

• A)When hard water passes over a resin in the softener,the Ca²⁺ and Mg²⁺ ions in the water bind to the resin in place of Na⁺ ions.
• B)The softener releases an acid to interact with the Ca²⁺ and Mg²⁺ ions in the hard water to neutralize them.
• C)When hard water passes through the softener,the Ca²⁺ and Mg²⁺ ions are removed through electrolysis.
• D)The softener releases K⁺ ions to counteract the Ca²⁺ and Mg²⁺ ions in the hard water.
• E)When hard water passes through the softener,the Ca²⁺ and Mg²⁺ ions precipitate out as Mg(OH)₂ and Ca(OH)₂.

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