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Author Question: A solution may contain the following ions Ag+, Cu2+, Cd2+, Mn2+, Ni2+ and Na+. A white precipitate ... (Read 49 times)

Capo

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Question 1

Which metal sulfides can be precipitated from a solution that is 0.01 M in Mn2+, Zn2+, Pb2+ and Cu2+ and 0.10 M in H2S at a pH of 0.50?



◦ CuS
◦ ZnS, PbS, CuS
◦ PbS, CuS
◦ MnS

Question 2

A solution may contain the following ions Ag+, Cu2+, Cd2+, Mn2+, Ni2+ and Na+. A white precipitate formed when 0.10 M NaCl was added and after this was removed the solution was treated with H2S gas under acidic conditions and no precipitate formed. When the solution was made basic and again treated with H2S gas a dark colored precipitate formed. If no further tests were made then what conclusions can you draw?
◦ possible ions present Ag+, Mn2+, Ni2+, Na+
◦ possible ions present Ag+, Cu2+, Cd2+, Na+
◦ possible ions present Ag+, Mn2+, Ni2+
◦ possible ions present Ag+, Cu2+, Cd2+


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Marked as best answer by Capo on Feb 15, 2020

Natalie4ever

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Capo

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Reply 2 on: Feb 15, 2020
Thanks for the timely response, appreciate it


cdmart10

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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