In the qualitative detection of phosphorus, the final canary yellow precipitate is ammonium phosphom — Practical Organic Chemistry and Purification Chemistry Question
Question
In the qualitative detection of phosphorus, the final canary yellow precipitate is ammonium phosphomolybdate. Its molecular formula is given as $(NH_4)_3PO_4 \cdot xMoO_3$. What is the integer value of $x$?
Answer: 12
💡 Solution & Explanation
The reaction of phosphoric acid with ammonium molybdate in the presence of nitric acid yields ammonium phosphomolybdate, a canary yellow precipitate. The precise stoichiometric formula for this complex is $(NH_4)_3PO_4 \cdot 12MoO_3$, meaning $x = 12$.
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