A Sample of Water Has Hardness Expressed as 81 Ppm

question 5

Multiple Choice

A sample of water has hardness expressed as 81 ppm Ca²⁺(aq) .The sample is passed through an ion exchange column and the Ca²⁺(aq) ions are replaced by H⁺(aq) ions.What is the pH of the water after it has been treated? (1 ppm = 1 g solute/10⁶ g solution)

• A)2.50 ppm
• B)1.10 ppm
• C)0.79 ppm
• D)2.39 ppm
• E)2.70 ppm

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The extent to which a problem or system can be understood and examined through logical investigation.

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A principle that organizational structure should be designed to facilitate the strategic objectives the organization seeks to achieve.

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