Analytical ChemistryHard
Question
A black sulphide is formed by the action of H2S on :
Options
A.cupric chloride
B.cadmium chloride
C.zinc chloride
D.ferric chloride
Solution
(A) Cu2+ + S2- → CuS↓ (black),
(B) Cd2 + S2- → CdS↓ (yellow),
(C) Zn2+ + S2- → ZnS↓ (white),
(D) 2Fe3+ + H2S → 2Fe2+ + 2H+ + S↓ (milky white)
(B) Cd2 + S2- → CdS↓ (yellow),
(C) Zn2+ + S2- → ZnS↓ (white),
(D) 2Fe3+ + H2S → 2Fe2+ + 2H+ + S↓ (milky white)
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