A Sample of Water Has Hardness Expressed as 1

question 40

Multiple Choice

A sample of water has hardness expressed as 1.6 × 10² ppm Ca²⁺. The sample is passed through an ion exchange column and the Ca²⁺ ions are replaced by H⁺ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

• A) 2.09
• B) -.80
• C) 1.10
• D) 7.00
• E) 2.40

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