Qualitative Analysis - Result Question 8
####8. $MgSO _4$ on reaction with $NH _4 OH$ and $Na _2 HPO _4$ forms a white crystalline precipitate. What is its formula?
(2006)
(a) $Mg\left(NH _4\right) PO _4$
(b) $Mg _3\left(PO _4\right) _2$
(c) $MgCl _2 \cdot MgSO _4$
(d) $MgSO _4$
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Answer:
Correct Answer: 8. (a)
Solution:
- $MgSO _4+NH _4 OH+Na _2 HPO _4 \longrightarrow Mg\left(NH _4\right) PO _4 \downarrow$
White
$$ +Na _2 SO _4+H _2 O $$
