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

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23-03-2018
Chemistry

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

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mixter17 mixter17 · Answer 1 · 2018-04-05T06:06:01+02:00

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 + 3NH₄⁺ + 12MoO₄⁻² + 24H⁺ → (NH₄)₃PO₄.12MoO₃(s)↓ + 12H₂O

Have a nice day!