Practical Organic Chemistry and PurificationhardMCQ MULTIPLE

In the quantitative estimation of phosphorus by various standard methods, the organic compound is oxPractical Organic Chemistry and Purification Chemistry Question

Question

In the quantitative estimation of phosphorus by various standard methods, the organic compound is oxidized such that phosphorus converts to $H_3PO_4$. Which of the following formulas represent the final weighed precipitate forms of phosphorus?

Answer: A,B

💡 Solution & Explanation

Phosphorus is estimated by two main methods: precipitating it directly as canary yellow Ammonium phosphomolybdate, $(NH_4)_3PO_4 \cdot 12MoO_3$, or precipitating it as $MgNH_4PO_4$ which upon ignition yields Magnesium pyrophosphate, $Mg_2P_2O_7$, for weighing.

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