What tests would you use to identify a solution of ag3po4?

Hello!

There are two tests one could use to identify a solution of Ag₃PO₄ (keep in mind that this compound is very insoluble and very little amounts of it are in solution)

For Ag⁺ ion: Precipitate with NaCl. The adding of NaCl should produce a white precipitate.

Ag⁺ (aq) + NaCl (s) → AgCl (s) ↓ + Na⁺

For PO₄⁻³ ion: Precipitate with Ammonium Molybdate and Acid. This reaction should produce a yellow precipitate:

PO₄⁻³ + 3NH ₄⁺ + 12MoO ₄⁻² + 24H ⁺ → (NH ₄) ₃PO₄.12MoO₃ (s) ↓ + 12H ₂ O

Have a nice day!