A sample contains MgNH₄(PO₄)₂,Sb₂S₃,KBr,Cr(OH)₃,and PbCl₂.Identify the precipitate after the addition of 6 M HCl; then H₂S and 0.2 M HCl. A) MgNH₄(PO₄)₂ B) Sb₂S₃ C) KBr D) Cr(OH)₃ E) PbCl₂

Question

Quizplus · Accepted Answer

When 6 M HCl is added, it will react with Sb₂ to form SbCl₂2, which is insoluble and will precipitate out of the solution. None of the other compounds in the sample will form a precipitate with HCl at this concentration or in the presence of H₂S.

A Sample Contains MgNH4(PO4)2, Sb2S3,KBr,Cr(OH)3,and PbCl2

A Sample Contains MgNH₄(PO₄)₂,Sb₂S₃,KBr,Cr(OH)₃,and PbCl₂