From the list of reagents — AgNO3, BaCl2, Pb(OAc)2, HgCl2, CuSO4, SbCl3 — how many will produce a black precipitate of the metal sulphide when treated with H2S?

Question

Accepted Answer

4. AgNO3 gives Ag2S (black), Pb(OAc)2 gives PbS (black), HgCl2 gives HgS (black), and CuSO4 gives CuS (black) — four black precipitates. BaCl2 gives no precipitate (BaS is soluble) and SbCl3 gives Sb2S3 which is orange.

From the list of reagents — AgNO3, BaCl2, Pb(OAc)2, HgCl2, CuSO4, SbCl3 — how many will produce a black precipitate of the metal sulphide when treated with H2S?

Solution

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