(b) If 0.01 M of each of the following ions is in the solution, which will form

Question

(b) If 0.01 M of each of the following ions is in the solution, which will form a precipitate? (Select all that apply.)In a qualitative analysis procedure, a chemist adds HCl to an unknown group of ions and then saturates the solution with H2S so that the solution is 0.2 M in HCl and 0.10 M in H2S.
** I only need part B please)

H2S so that the solution is 0.2 M in HCl and 0.10 M in H2S (a) What is the [HS ] of the solution? (Note: The answer should be rounded to one significant figure. Be careful, 3.5 rounds up to 4, but 4.5 rounds down to 4!) b) If 0.01 M of each of the following ions is in the solution, which will form a precipitate? (Select all that apply.) Ag+ Pb2+ Mn2+ O Ni2+ O Fe2+ O Cu2+ Hg2+ First, calculate (HS ] produced by the dissociation of Hint: H2S from the given concentrations of HCI and H2S. Second, calculate [OH] from the given concentration of HCI. Then calculate Qsp for each of the metal sulfides. Remember, sulfides have unique solubility equilibria.

Explanation / Answer

Ans: AgCl (ppt), MnS (buff ppt), PbS (Black ppt), CuS (Black ppt), HgS (Black ppt), and NiS (Black ppt)

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