Analytical ChemistryHard
Question
Zn(OH)2↓ is soluble in :
Options
A.excess of sodium hydroxide
B.excess of ammonia solution
C.solutions of ammonium salts
D.all of these
Solution
(A) Zn(OH)2↓ + 2OH- ⇋ [Zn(OH)4]2-
(B) and (C) Zn(OH)2↓ + 4NH3 ⇋ [Zn(NH3)4]2+ + 2OH-
or NH4+
(B) and (C) Zn(OH)2↓ + 4NH3 ⇋ [Zn(NH3)4]2+ + 2OH-
or NH4+
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