Question

Hard water often contains dissolved Ca2+ and Mg2+ ions. One
way to soften water is to add phosphates. The phosphate ion
forms insoluble precipitates with calcium and magnesium ions,
removing them from solution. Suppose that a solution is 0.050
M in calcium chloride and 0.085 M in magnesium nitrate.
What mass of sodium phosphate must be added to 1.5 L of this
solution to completely eliminate the hard water ions? Assume
complete reaction.

Answer 1

Explanation:

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