Question

$MgSO_4$ on reaction with $NH_4 OH$ and $Na_2 HPO_4$ forms a white crystalline precipitate. What is its formula?

• A. $Mg (NH_4)PO_4$
• B. $Mg_3 (PO_4)_2$
• C. $MgCI_2.MgSO_4$
• D. $MgSO_4$

Answer 1

Answer: (A)

$Mg (NH_4)PO_4$

Answer 2

$MgSO_4 + NH_4 OH + Na_2 HPO_4 \longrightarrow \underset{White}{Mg(NH_4)PO_4 \downarrow}$
\hspace73mm + Na_2 SO_4 + H_2 O