d and f-Block ElementsHard
Question
The equilibrium
2CuI ⇋ Cuo + CuII
in aqueous medium at 25oC shifts towards the left in the presence of
2CuI ⇋ Cuo + CuII
in aqueous medium at 25oC shifts towards the left in the presence of
Options
A.3 NO-
B.Cl-
C.SCN-
D.CN-
Solution
Cu2+ ions will react with CN- and SCN- forming [Cu(CN)4]3- and [Cu(SCN)4]3- leading the reaction in the backward direction.
Cu2+ + 2CN- → Cu(CN)2
Cu(CN)2 → 2CuCN + (CN)2
CuCN + 3 CN- → [Cu(CN)4]3-
Cu2+ + 4SCN- → [Cu(SCN)4]3-
Cu2+ also combines with CuCl2 which reacts with Cu to produce CuCl pushing the reaction in the backward direction.
CuCl2 + Cu → 2CuCl↓
Cu2+ + 2CN- → Cu(CN)2
Cu(CN)2 → 2CuCN + (CN)2
CuCN + 3 CN- → [Cu(CN)4]3-
Cu2+ + 4SCN- → [Cu(SCN)4]3-
Cu2+ also combines with CuCl2 which reacts with Cu to produce CuCl pushing the reaction in the backward direction.
CuCl2 + Cu → 2CuCl↓
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