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
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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Transcribed Image Text: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+
Bi+, Cd²+, Cu²+, Hg2+, Pb²+,
Sb +, Sn²+, Sn²+
AP+, Co²+, Cr³+, Fe²+, Fe³+,
Ni²+, Mn²+, Zn²+
Ba²+, Ca²+, Mg2+, Sr²+
Li+, Na+, K+, NH;
None of these ions were present.
Incorrect
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
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