Analytical ChemistryHard
Question
Which of the following statement(s) is/are correct ?
Options
A.Yellow precipitated of silver arsenite is soluble in both nitric acid and ammonia.
B.Potassium cyanide when added in very small quantity to copper sulphate solution, produces first yellow precipitate which quickly converts in to white precipitate.
C.Black precipitate of BiI3 turns orange on heating with water.
D.White precipitate of Bi(OH)3 turns yellowish brown, when boiled.
Solution
(A) Correct.
(B) Cu2+ + 2CN- → Cu(CN)2↓ (yellow)
2Cu(CN)2↓ → 2Cu(CN)2↓ (white) + (CN)2 ↑
(C) BiI3↓ + H2O
BiOI ↓ (orange) + 2HI
(D) Bi(OH)3↓
BiO.OH↓ (yellowish white) + H2O
(B) Cu2+ + 2CN- → Cu(CN)2↓ (yellow)
2Cu(CN)2↓ → 2Cu(CN)2↓ (white) + (CN)2 ↑
(C) BiI3↓ + H2O
BiOI ↓ (orange) + 2HI(D) Bi(OH)3↓
BiO.OH↓ (yellowish white) + H2OCreate a free account to view solution
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