What Minimum Mass of Cobalt (II)nitrate Must Be Added to 60.0

question 50

Multiple Choice

What minimum mass of cobalt (II) nitrate must be added to 60.0 mL of a 0.0999 M phosphate solution in order to completely precipitate all of the phosphate as solid cobalt (II) phosphate? 2PO₄^3-(aq) + 3Co(NO₃) ₂(aq) → Co₃(PO₄) ₂(s) + 6NO₃^-(aq)

• A) 1.10 g
• B) 3.29 g
• C) 0.731 g
• D) 0.366 g
• E) 1.64 g

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