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Question: Answered & Verified by Expert
A sample of $\mathrm{MgCO}_3$ is dissolved in dil. $\mathrm{HCl}$ and the solution is neutralized with ammonia and buffered with $\mathrm{NH} \mathrm{Cl}_4 /$ $\mathrm{NH}_4 \mathrm{OH}$. Disodium hydrogen phosphate reagent is added to the resulting solution. A white precipitate is formed. What is the formula of the precipitate?
Chemistrys Block ElementsWBJEEWBJEE 2022
Options:
  • A $\mathrm{Mg}_3\left(\mathrm{PO}_4\right)_2$
  • B $\mathrm{Mg}\left(\mathrm{NH}_4\right) \mathrm{PO}_4$
  • C $\mathrm{MgHPO}_4$
  • D $\mathrm{Mg}_2 \mathrm{P}_2 \mathrm{O}_7$
Solution:
1629 Upvotes Verified Answer
The correct answer is: $\mathrm{Mg}\left(\mathrm{NH}_4\right) \mathrm{PO}_4$

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