Homework Answers
A. No reaction with dilute nitric acid is not a significant indication.
B. No effect of the addition of silver nitrate means it does not have halogens.
C. A white ppt with BaCl2 means it can be sulfate ion, which forms the insoluble white ppt of BaSO4.
D. The yellow precipitate of adding ammonium molybdate indicates that phosphate was present. A yellow ammonium molybdatophosphate is formed
So,
Present = Sulfate (SO42-), Phosphate (PO43-)
Absent = Chloride, Bromide, Iodide.
In doubt = Na+ (may be present along with the sulfate, as Na2SO4)
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2. An unknown containing one or more of the ions studied in this experiment has the...
Please explain if this is right? I think I am missing some things! Thanks 2. An...
Please explain if this is right? I think I am missing some
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2. An unknown containing one or more of the ions studied in this experiment has the following properties: A. No effect on addition of 6 M HNO B. No effect on addition of 0.1 M AgNO, to solution in Part A C. White precipitate on addition of I M BaCl, to solution in Part A. D. Yellow precipitate on addition of (NH)MoO, to solution in Part...
Advance Study Assignment: Spot Tests for Some Common Anions
An unknown containing one or more of the ions studied in this experiment has the following properties:a. No effect on addition of 6 M HNO3.b. No effect on addition of 0.1 M AgNO3 to solution in Part A.c. White precipitate on addition of 1 M BaCl2 to solution in Part A.d. Yellow precipitate on addion of (NH4)2MoO4, to solution in Part A.On the basis of this information which ions are present, which are absent,and which are in doubt?
Each of the observations listed was made on a different solution. Given the observation, state which...
Each of the observations listed was made on a different solution. Given the observation, state which ion studied in this experiment is present. If the test is not definitive, indicate that with a question mark. a. Addition of 6 M NaOH and Al to the solution produces a vapor that turns red litmus blue. Ion present: b. Addition of 6 M HCI produces a vapor with an acrid odor. Ion present: c. Addition of 6 M HNO_3 produces an effervescence....
An unknown that might contain any of the elght lons studied in this experiment but no...
An unknown that might contain any of the elght lons studied in this experiment but no other loux) has the following properties On adition of 1 MHCI, bubbles form. . When I MB , le added to the acidified unknow, a white precipitats results, e. When I MANO, Ia added to the unknown, clear solution recull On the basis of the preceding Information, clasally each of the following lone w present (P), absent (A), or undetermined (U) by the tests...
3. A solution that may contain any of the group III cations. Treatment of the solution with CIO i...
3. A solution that may contain any of the group III cations. Treatment of the solution with CIO in alkaline medium yields a yellow solution and a colored precipitate. The acidified solution is unaffected by treatment with NH,OH. The colored precipitate dissolves in nitric acid; addition of excess NH,OH to this acidic solution produces only a blue solution. Which group III ions are present? Which are absent? Which are in doubt? How would you remove all doubt?
3. A solution...
2. A solution that may contain Sn.Bi. Cu and Cd²+ ions is treated with thioacetamide in...
2. A solution that may contain Sn.Bi. Cu and Cd²+ ions is treated with thioacetamide in an acidic medium. The black precipitate that forms is partly soluble in a strongly alkaline solution. The precipitate that remains is soluble in 6M HNO, and gives a blue solution when treated with excess NH. Based on this information, which ions are present, which are absent, and which are still in doubt? 3. Explain how controlling the solution pH allows separation of Group II...
3. A solution that may contain any of the group III cations. Treatment of the solution...
3. A solution that may contain any of the group III cations. Treatment of the solution with CIO in alkaline medium yields a yellow solution and a colored precipitate. The acidified solution is unaffected by treatment with NH,OH. The colored precipitate dissolves in nitric acid; addition of excess NH,OH to this acidic solution produces only a blue solution. Which group III ions are present? Which are absent? Which are in doubt? How would you remove all doubt? 149
identification and selected ions INSTRUCTOR REPORT FOR EXPERIMENT 14 Identification of Selected Anions Naci | Nal...
identification and selected ions
INSTRUCTOR REPORT FOR EXPERIMENT 14 Identification of Selected Anions Naci | Nal NaBr Na so, Naso, Na.co. Unknown Unknown Na PO, INo. A AgNO, Test Addition of AgNO, solution Addition of dil. HNO, 127 - B. BaCl, Test Addition of BaCl, solution Addition of dil. HCI c. Organic Solvent Test Color of decane layer D. Formula of anion present in the solution tested.
2. A solution that may contain Sn.Bi. Cu? and Cdions is treated with thioacetamide in an...
2. A solution that may contain Sn.Bi. Cu? and Cdions is treated with thioacetamide in an acidic medium. The black precipitate that forms is partly soluble in a strongly alkaline solution. The precipitate that remains is soluble in 6M HNO, and gives a blue solution when treated with excess NH Based on this information, which ions are present, which are absent, and which are still in doubt? Present Absent Snut Cu 2+ Bi 34 3. Explain how controlling the solution...
A solution that may contain Cu2+, Bi3+, Sn4+, or Sb3+ ions is treated with thioacetamide in an ac...
A solution that may contain Cu2+, Bi3+, Sn4+, or Sb3+ ions is treated with thioacetamide in an acid medium. The black precipitate that forms is partly soluble in strongly basic solution. The precipitate that remains is soluble in 6 M HNO3 and gives only a white precipitate upon the addition of NH4OH. The basic solution, when acidified, produces, an orange precipitate.. which group 2 ions are present? which are absent? and which are still in doubt? How would you remove...
Please explain if this is right? I think I am missing some
things! Thanks
2. An unknown containing one or more of the ions studied in this experiment has the following properties: A. No effect on addition of 6 M HNO B. No effect on addition of 0.1 M AgNO, to solution in Part A C. White precipitate on addition of I M BaCl, to solution in Part A. D. Yellow precipitate on addition of (NH)MoO, to solution in Part...
Each of the observations listed was made on a different solution. Given the observation, state which ion studied in this experiment is present. If the test is not definitive, indicate that with a question mark. a. Addition of 6 M NaOH and Al to the solution produces a vapor that turns red litmus blue. Ion present: b. Addition of 6 M HCI produces a vapor with an acrid odor. Ion present: c. Addition of 6 M HNO_3 produces an effervescence....
An unknown that might contain any of the elght lons studied in this experiment but no other loux) has the following properties On adition of 1 MHCI, bubbles form. . When I MB , le added to the acidified unknow, a white precipitats results, e. When I MANO, Ia added to the unknown, clear solution recull On the basis of the preceding Information, clasally each of the following lone w present (P), absent (A), or undetermined (U) by the tests...
3. A solution that may contain any of the group III cations. Treatment of the solution with CIO in alkaline medium yields a yellow solution and a colored precipitate. The acidified solution is unaffected by treatment with NH,OH. The colored precipitate dissolves in nitric acid; addition of excess NH,OH to this acidic solution produces only a blue solution. Which group III ions are present? Which are absent? Which are in doubt? How would you remove all doubt?
3. A solution...
2. A solution that may contain Sn.Bi. Cu and Cd²+ ions is treated with thioacetamide in an acidic medium. The black precipitate that forms is partly soluble in a strongly alkaline solution. The precipitate that remains is soluble in 6M HNO, and gives a blue solution when treated with excess NH. Based on this information, which ions are present, which are absent, and which are still in doubt? 3. Explain how controlling the solution pH allows separation of Group II...
3. A solution that may contain any of the group III cations. Treatment of the solution with CIO in alkaline medium yields a yellow solution and a colored precipitate. The acidified solution is unaffected by treatment with NH,OH. The colored precipitate dissolves in nitric acid; addition of excess NH,OH to this acidic solution produces only a blue solution. Which group III ions are present? Which are absent? Which are in doubt? How would you remove all doubt? 149
identification and selected ions
INSTRUCTOR REPORT FOR EXPERIMENT 14 Identification of Selected Anions Naci | Nal NaBr Na so, Naso, Na.co. Unknown Unknown Na PO, INo. A AgNO, Test Addition of AgNO, solution Addition of dil. HNO, 127 - B. BaCl, Test Addition of BaCl, solution Addition of dil. HCI c. Organic Solvent Test Color of decane layer D. Formula of anion present in the solution tested.
2. A solution that may contain Sn.Bi. Cu? and Cdions is treated with thioacetamide in an acidic medium. The black precipitate that forms is partly soluble in a strongly alkaline solution. The precipitate that remains is soluble in 6M HNO, and gives a blue solution when treated with excess NH Based on this information, which ions are present, which are absent, and which are still in doubt? Present Absent Snut Cu 2+ Bi 34 3. Explain how controlling the solution...
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