Analytical ChemistryHard
Question
In which of the following reactions, white precipitate is obtained as one of the reaction products ?
Options
A.Pb2+ (aq) + CO32- (aq) + H2O (l)→ Products
B.Pb2+ (aq) + Br- (aq) → Products
C.Ag+ (aq) + NH3 (aq) + H2O (l) → Products
D.Ag+ (aq) + Cl- (aq) → Products
Solution
(A) 2Pb2+ (aq) + 2CO32- (aq) + H2O (l) → Pb(OH)2 ↓ (white) + PbCO3↓ (white) + CO2 ↑
(B) Pb2+ (aq) + 2Br- (aq) → PbBr2 ↑ (white)
(C) 2Ag+ (aq) + 2NH3 (aq) + H2O (l) → Ag2O ↓ (brown) + 2NH4+
(D) Ag+ (aq) + Cl- (aq) → AgCl ↓ (white)
(B) Pb2+ (aq) + 2Br- (aq) → PbBr2 ↑ (white)
(C) 2Ag+ (aq) + 2NH3 (aq) + H2O (l) → Ag2O ↓ (brown) + 2NH4+
(D) Ag+ (aq) + Cl- (aq) → AgCl ↓ (white)
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