A sample contains Ca₃(PO₄)₂,HgS,AgCl,NH₄Cl,and NiS.Identify the soluble compound after the addition of 6 M HCl; then H₂S and 0.2 M HCl; then OH^-to a pH of 8; and then (NH₄)₂HPO₄ with NH₃. A) Ca₃(PO₄)₂ B) HgS C) AgCl D) NH₄Cl E) NiS

Question

Quizplus · Accepted Answer

NH4Cl is the soluble compound in this scenario. When HCl is added, compounds like AgCl, which is already mentioned, will not dissolve due to its low solubility in water. Similarly, sulfides like HgS, NiS, and CaS typically do not dissolve in acidic conditions due to the formation of H2S gas, which is minimally soluble. However, NH4Cl is highly soluble in water and remains soluble upon the addition of HCl, the introduction of H2S, adjustment of pH to 8, and even after the addition of (NH4)2S.

A Sample Contains Ca3(PO4)2, HgS,AgCl,NH4Cl,and NiS

A Sample Contains Ca₃(PO₄)₂,HgS,AgCl,NH₄Cl,and NiS