What Minimum Mass of Iron (II)nitrate Must Be Added to 10.0

question 84

Multiple Choice

What minimum mass of iron (II) nitrate must be added to 10.0 of a 0.0699 M phosphate solution in order to completely precipitate all of the phosphate as solid iron (II) phosphate?
2PO₄^3-(aq) + 3Fe(NO₃) ₂(aq) → Fe₃(PO₄) ₂(s) + 6NO₃^-(aq)

• A)0.125 g
• B)0.377 g
• C)0.0838 g
• D)0.0419 g
• E)0.188 g

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