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A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCI was added and a precipitate formed. The precipitate was filtered off. 2. H₂S was bubbled through the acidic solution. No precipitate formed. 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 and no precipitate formed. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg2+ Bi³ +, Cd²+, Cu²+, Hg²+, Pb²+, Sb³ +, Sn²+, Sn4 + Al³+, Co²+, Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr² + Li+, Na+, K+, NH At least one of these ions was 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. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown None of these ions were present. unknown

A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCI was added and a precipitate formed. The precipitate was filtered off. 2. H₂S was bubbled through the acidic solution. No precipitate formed. 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 and no precipitate formed. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg2+ Bi³ +, Cd²+, Cu²+, Hg²+, Pb²+, Sb³ +, Sn²+, Sn4 + Al³+, Co²+, Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr² + Li+, Na+, K+, NH At least one of these ions was 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. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown None of these ions were present. unknown

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 65QAP: Follow the directions of Question 64. Consider two beakers: Beaker A has a weak acid(K a=1105)....
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A solution containing a mixture of metal cations was treated as outlined.

  1. Dilute HClHCl was added and a precipitate formed. The precipitate was filtered off.
  2. H2SH2S was bubbled through the acidic solution. No precipitate formed.
  3. The pH was raised to about 9 and H2SH2S was again bubbled through the solution. A precipitate formed and was filtered off.
  4. Finally, sodium carbonate was added to the filtered solution and no precipitate formed.

What can be said about the presence of each of these groups of cations in the original solution?

A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCl was added and a precipitate formed. The precipitate was filtered off. 2. H₂S was bubbled through the acidic solution. No precipitate formed. 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 and no precipitate formed. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg²+ Bi³ +, Cd²+, Cu²+, Pb²+, Sb³ +, 2 + 4+ Sn² Snª 9 2 + 9 Hg² Al³+, Co²+, Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr² + Li+, Na+, K+, NH At least one of these ions was 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. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown None of these ions were present. unknown
Transcribed Image Text:A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCl was added and a precipitate formed. The precipitate was filtered off. 2. H₂S was bubbled through the acidic solution. No precipitate formed. 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 and no precipitate formed. What can be said about the presence of each of these groups of cations in the original solution? Cation group Ag+, Pb²+, Hg²+ Bi³ +, Cd²+, Cu²+, Pb²+, Sb³ +, 2 + 4+ Sn² Snª 9 2 + 9 Hg² Al³+, Co²+, Cr³+, Fe²+, Fe³+, Ni²+, Mn²+, Zn²+ Ba²+, Ca²+, Mg²+, Sr² + Li+, Na+, K+, NH At least one of these ions was 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. None of these ions were present. At least one of these ions was present. At least one of these ions was present. unknown None of these ions were present. unknown
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