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Answer to Question #72983 in Inorganic Chemistry for Shivani Sharma
Question #72983
Which will not be precipitated after addition of
Ammonium carbonate in presence of NH4CI :-
(1) Mg (2) Ba
(3) Ca (4) Sr
Ammonium carbonate in presence of NH4CI :-
(1) Mg (2) Ba
(3) Ca (4) Sr
Expert's answer
Solution:
When (NH4)2CO3 is added to salt solution containing NH4Cl and NH4OH, the carbonates of Ba2+, Sr2+ and Ca2+ are precipitated:
BaCl2+(NH4)2CO3 → BaCO3↓+ 2NH4Cl
SrCl2+(NH4)2CO3 → SrCO3↓+ 2NH4Cl
CaCl2+(NH4)2CO3 → CaCO3↓+ 2NH4Cl
Then answer (1) - Mg
When (NH4)2CO3 is added to salt solution containing NH4Cl and NH4OH, the carbonates of Ba2+, Sr2+ and Ca2+ are precipitated:
BaCl2+(NH4)2CO3 → BaCO3↓+ 2NH4Cl
SrCl2+(NH4)2CO3 → SrCO3↓+ 2NH4Cl
CaCl2+(NH4)2CO3 → CaCO3↓+ 2NH4Cl
Then answer (1) - Mg
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Why Mg not precipited ? what's the reason
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