Answer to Question #134907 in General Chemistry for Nielle

Question

Which of the following aqueous solutions when mixed will have a precipitation reaction occur? If yes write balanced molecular, total ionic and net ionic equations.
a) Potassium carbonate + barium hydroxide
b) aluminum nitrate + sodium phosphate

Answer 1

Precipitate is formed in both reactions:

a) Molecular equation:

K₂CO₃+Ba(OH)₂=2KOH+BaCO₃

Total ionic equation:

2K⁺ + CO₃^2- +Ba²⁺ + 2OH^- = 2K⁺ + 2OH^- + BaCO₃

Net ionic equation:

CO₃^2- + Ba²⁺ = BaCO₃.

b) Molecular equation:

Al(NO₃)₃+Na₃PO₄ = AlPO₄ + 3NaNO₃

Total ionic equation:

Al³⁺ + 3NO₃^- + 3Na⁺ + PO₄^3- = AlPO₄ + 3Na⁺ + 3NO₃^-

Net ionic equation:

Al³⁺ + PO₄^3- = AlPO₄