A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCI was added and no precipitate formed. 2. H₂S was bubbled through the acidic solution. A precipitate formed and was filtered off. 3. The pH was raised to about 9 and H₂S was again bubbled through the solution. A precipitate formed and was filtered off. 4. Finally, sodium carbonate was added to the filtered solution. A precipitate formed and was filtered off. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg+ Bi³+Cd²+ Cu²+, Hg²+, Pb²+ Sb³+, Sn²+, Sn+ AP Co. Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr²³+ Lit, Na+, K+, NH; None of these ions were present Description form insoluble chlorides form acid-insoluble sulfides form base-insoluble sulfides or hydroxides form insoluble carbonates completely soluble Answer Bank All of these ions were present Present in the original solution? At least one of these ions was present. At least one of these ions was present. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown unknown
A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCI was added and no precipitate formed. 2. H₂S was bubbled through the acidic solution. A precipitate formed and was filtered off. 3. The pH was raised to about 9 and H₂S was again bubbled through the solution. A precipitate formed and was filtered off. 4. Finally, sodium carbonate was added to the filtered solution. A precipitate formed and was filtered off. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg+ Bi³+Cd²+ Cu²+, Hg²+, Pb²+ Sb³+, Sn²+, Sn+ AP Co. Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr²³+ Lit, Na+, K+, NH; None of these ions were present Description form insoluble chlorides form acid-insoluble sulfides form base-insoluble sulfides or hydroxides form insoluble carbonates completely soluble Answer Bank All of these ions were present Present in the original solution? At least one of these ions was present. At least one of these ions was present. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown unknown
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 97AP
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