A Sample Contains Ba₃(PO₄)₂, CdS, AgCl, NH₄Cl, and ZnS

question 138

Multiple Choice

A sample contains Ba₃(PO₄) ₂, CdS, AgCl, NH₄Cl, and ZnS. Identify the soluble salt remaining in the solution after the addition of 6 mol L^-1 HCl, followed by the addition of H₂S and 0.2 mol L^-1 HCl, then the addition of OH^- to a pH of 8, and finally the addition of (NH₄) ₂HPO₄ with NH₃.

• A) Ba₃(PO₄)₂
• B) CdS
• C) AgCl
• D) NH₄Cl
• E) ZnS

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