JAMB Chemistry 2012 Objective — Question 14
Question 14 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2012 Objective paper, with the correct answer and a full explanation.
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The chemicals used to soften hard water involves the addition of
- A. insoluble sodium compounds which form soluble solutions of calcium and magnesium ions
- B. soluble sodium compounds which form soluble solutions of calcium and magnesium ions
- C. soluble sodium compounds which form insoluble precipitates of calcium and magnesium ionsCorrect
- D. insoluble sodium compounds which form insoluble precipitates of calcium and magnesium ions
Explanation
Softening hard water involves the addition of soluble sodium compounds which form insoluble precipitates of calcium and magnesium ions, thereby removing them from solution.
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