A sample contains Ca₃(PO₄)₂,HgS,AgCl,NH₄Br,and CoS.Identify the precipitate after the addition of 6 M HCl,then H₂S and 0.2 M HCl.

Question

Quizplus · Accepted Answer

Adding 6 M HCl will dissolve most precipitates except for those that are insoluble in strong acids, like HgS. Upon the addition of H2S in acidic solution, HgS remains as a precipitate due to its very low solubility product, distinguishing it from other sulfides which might either not precipitate or dissolve under these conditions.

A Sample Contains Ca3(PO4)2, HgS,AgCl,NH4Br,and CoS

A Sample Contains Ca₃(PO₄)₂,HgS,AgCl,NH₄Br,and CoS