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MgSO(4) on reaction with NH(4)OH and Na(...

`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

`MgCl_(2).MgSO_(4)`

D

`MgSO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
`MgSO_(4)` on reaction with `Na_(2)HPO_(4)` (disodium hydrogen phosphate) in presence of `NH_(4)OH` to give white precipitate of magnesium ammonium phosphate `[Mg(NH_(4))PO_(4)]`
`MgSO_(4) +Na_(2)HPO_(4) + NH_(4)OH to underset("white ppt.")(Mg (NH_(4)) PO_(4) darr) + Na_2 SO_(4) + H_(2)O`
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