`MgSO_(4)` on reaction with `NH_(4)OH` and `Na_(2)HPO_(4)` forms a white crystalline precipitate. What is its formula ?

Options

A. `Mg(NH_(4))PO_(4)`
B. `Mg_(3)(PO_(4))_(2)`
C. `MgCl_(2),MgSO_(4)`
D. `MgSO_(4)`

Answer

A

Explanation

Test of `Mg^(+2)` ion
`Mg^(+2) + NH_(4)OH + Na_(2)HPO_(4) to Mg(NH_(4))PO_(4)`