Question

When aqueous solutions of potassium phosphate and barium nitrate are combined, does a reaction occur? If a reaction does occur, write the balanced formula equation, and net ionic equation.

Answer 1

1) Yes, there will be a reaction between K₃PO₄ (Potassium Phosphate) and Ba(NO₃)₂ (Barium Nitrate).

3 Ba(NO₃)_{2 (aq)} + 2 Na₃PO_{4 (aq)} -----------> Ba₃(PO₄)_{2 (s)} + 6 NaNO_{3 (aq)}  

This is the balanced chemical equation, let us break it into ionic form

3 Ba²⁺_(aq) + 6 NO₃^-_(aq) + 6 Na⁺_(aq) + 2 PO₄^3-_(aq)  ----------> Ba₃(PO₄)_{2 (s)} + 6 Na+_(aq)  + 6 NO₃^-_(aq)

  Na⁺ and   NO₃^- will be canceled and the net ionic reaction is going to be

  3 Ba²⁺_(aq) + 2 PO₄^3-_(aq) ---------> Ba₃(PO₄)_{2 (s)}