Homework Answers
In 6 M HCl no precipitate was observed. That means there in no Ag+ in the sample. Because if it was there then precipitate of AgCl would have been a must observed phenomenon. So, ION ABSENT : Ag+.
In NH4Cl , NH3 buffer system, Al(OH)3 precipitates not Zn(OH)2. Because solubility product of the later one is quite higher than the former one. Also, from the concept of qualitative detection, we detect Zn by the precipitation of ZnS in alkalined medium because it has much lower solubility. So, the precipitate formed in our case is for Al(OH)3 only. So, ION PRESENT : Al3+.
Since, no test for determination of Zn is done, so it can not be determined. So, ION UNDETERMINED : Zn2+.
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3. It is believed that a solution may contain the ions Ag, Al., and Zn2.. Addition...
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...
You are presented with an unknown that possibly has Ag+, Bi3+, Sn4+, Zn2+, Co2+ and Na+....
You are presented with an unknown that possibly has Ag+, Bi3+, Sn4+, Zn2+, Co2+ and Na+. You divide the solution into three equal volumes, labeling one “A,” one “B,” and one “C.” To “A” you add 6 M HCl and do not observe any precipitate forming. In tube B, you add 6 M HCl until the pH is 0.5 then add thioacetamide and heat the solution in a hot water bath for seven minutes, eventually observing a black precipitate. You...
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...
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
a solution that may contain any of the group three cations. Treatment of the solution with...
a solution that may contain any of the group three cations. Treatment of the solution with clo- in alkaline medium yields a yellow solution and a colored precipitate. The Acidified solution is unaffected by treatment with nh4oh. The colored precipitate dissolves in nitric acid addition; addition of excess nh4oh to this acidic solution produces only a blue solution. Which group 3 ions are present? which are absent? which are in doubt? how would you remove all 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....
2) You are presented with an unknown that possibly has Ag-, Bi-, Sn+, Zn2+, Co2+ and...
2) You are presented with an unknown that possibly has Ag-, Bi-, Sn+, Zn2+, Co2+ and Na'. You divide the solution into three equal volumes, labeling one "A," one "B," and one "C." To "A" you add 6 M HCl and do not observe any precipitate forming. In tube B, you add 6 M HCl until the pH is 0.5 then add thioacetamide and heat the solution in a hot water bath for seven minutes, eventually observing a black precipitate....
A solution contains Ag^+ and Hg^2+ ions. The addition of 0.100 L of 1. 10 M...
A solution contains Ag^+ and Hg^2+ ions. The addition of 0.100 L of 1. 10 M Nal solution is just enough to precipitate all the ions as Agl and Hgl^2. The total mass of the precipitate is 25.6 g. Find the mass of Agl in the precipitate.
1. If your original unknown is colorless, what ions are absent from your unknown? 2. If...
1. If your original unknown is colorless, what ions are absent
from your unknown?
2. If you get no precipitate with just the 6 M NH3 in step B,
what ions are absent from your unknown?
pls help are my answers correct ty
17 Page 4 Aperiment 24. Qualitative Analysis Group III-NI, Mn, Fe, Al, Cr, Zn 1. PROCEDURES A. Observations of Samples. Obtain an unknown and record code. Observe color of unknown solution Common color correlations are: dark blue...
Lab Section: 1 Prelab: Inorganic Group I Ions 1. On the report sheet, complete the flow...
Lab Section: 1 Prelab: Inorganic Group I Ions 1. On the report sheet, complete the flow diagram for the separation and identification of the ions in Group I 2. Write balanced net ionic equations for the following reactions: The precipitation of the chloride of Pb a. in Step 1. The formation of a yellow precipitate in Step 4. b. The formation of a complex ion in Step 5. c. d. The reaction that forms a white precipitate in Step 5....
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...
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
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....
2) You are presented with an unknown that possibly has Ag-, Bi-, Sn+, Zn2+, Co2+ and Na'. You divide the solution into three equal volumes, labeling one "A," one "B," and one "C." To "A" you add 6 M HCl and do not observe any precipitate forming. In tube B, you add 6 M HCl until the pH is 0.5 then add thioacetamide and heat the solution in a hot water bath for seven minutes, eventually observing a black precipitate....
A solution contains Ag^+ and Hg^2+ ions. The addition of 0.100 L of 1. 10 M Nal solution is just enough to precipitate all the ions as Agl and Hgl^2. The total mass of the precipitate is 25.6 g. Find the mass of Agl in the precipitate.
1. If your original unknown is colorless, what ions are absent
from your unknown?
2. If you get no precipitate with just the 6 M NH3 in step B,
what ions are absent from your unknown?
pls help are my answers correct ty
17 Page 4 Aperiment 24. Qualitative Analysis Group III-NI, Mn, Fe, Al, Cr, Zn 1. PROCEDURES A. Observations of Samples. Obtain an unknown and record code. Observe color of unknown solution Common color correlations are: dark blue...
Lab Section: 1 Prelab: Inorganic Group I Ions 1. On the report sheet, complete the flow diagram for the separation and identification of the ions in Group I 2. Write balanced net ionic equations for the following reactions: The precipitation of the chloride of Pb a. in Step 1. The formation of a yellow precipitate in Step 4. b. The formation of a complex ion in Step 5. c. d. The reaction that forms a white precipitate in Step 5....
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