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. A solution is 0.050 M in calcium
chloride and 0.085 M in magnesium nitrate. What mass of sodium
phosphate would you add to 1.5 L of this solution to completely
eliminate the hard water ions? Assume complete
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Master Solution Stoichiometry with a bite sized video explanation from Jules Bruno