Analytical ChemistryHard
Question
Concentrated aqueous ammonia dissolve(s) which of the following completely ?
Options
A.AgCl
B.AgBr
C.Ag2CrO4
D.AgI
Solution
(A) AgCl dissolves completely forming [Ag(NH3)2]Cl ; AgCl + 2NH4OH → [Ag(NH3)2]Cl + 2H2O.
(B) AgBr dissolves completely forming [Ag(NH3)2] Br soluble complex.
AgBr + 2NH4OH → [Ag(NH3)2]Br+ 2H2O.
(C) Ag2CrO4 + 4NH3 → 2[Ag(NH3)2]+ + CrO42-
(D) AgI is insoluble in concentrated aqueous NH3.
(B) AgBr dissolves completely forming [Ag(NH3)2] Br soluble complex.
AgBr + 2NH4OH → [Ag(NH3)2]Br+ 2H2O.
(C) Ag2CrO4 + 4NH3 → 2[Ag(NH3)2]+ + CrO42-
(D) AgI is insoluble in concentrated aqueous NH3.
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