Ion-Exchange Resins Can Remove Mg²⁺ and Ca²⁺0 in Water (Called

question 37

Multiple Choice

Ion-exchange resins can remove Mg²⁺ and Ca²⁺0 in water (called softening) by releasing Na⁺. What would be the concentration of sodium ion in the softened water if the combined concentration of these Group 2A ions that were removed from the hard water was 0.026 M ?

• A)0.052 M
• B)0.26 M
• C)0.13 M
• D)0.00 M
• E)can't tell, necessary information is lacking

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