A solution containing a mixture of metal cations was treated with dilute HCl and

Question

A solution containing a mixture of metal cations was treated with dilute HCl and a precipitate formed. The solution was filtered and H2S was bubbled through the acidic solution. A precipitate again formed and was filtered off. Then, the pH was raised to about 8 and H2S was again bubbled through the solution. This time, no precipitate formed. Finally, the solution was treated with a sodium carbonate solution, which resulted in formation of a precipitate. Which metal ions were definiately present, which were definately absent, and which may or may not have been present in the original mixture?

Ag+, Mn2+, Hg2+, Pb2+, Hg2 ^2+, Cu2+, Ba2+, Ni2+, Co2+, Sn4+, Li+, Mg+ and Bi3+ Must be separated into 3 categories: DEFINATELY PRESENT, DEFINATELY ABSENT, POSSIBLY PRESENT?

I dont understand the chart and how is works. If someone could give me the answer and then explain how they got each one into each category and which category each one goes into.

Thank you

Explanation / Answer

definitely present=none

definitely absent= Ag+, Ba2+, Mg2+, Pb2+ and Hg2^2+

all the others go under possibly present=Cu2+, Mn2+, Ni2+, Co2+, Sn4+, Li+, Hg2+, Bi3+

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.