A solution contains some or all of the ions Cu²*, AP+, K*, Ca²+, Ba", Pb, and NH,* The following tests were performed, in order, on the solution. 1. Addition of 6 M HCl produced no reaction 2. Addition of H,S with 02 M HCl produced a black solid. 3. Addition of (NH,),S produced a white solid 4. Addition of (NH,),HPO, in NH, produced no reaction. 5. The final supenatant when heated produced a purple flame Identify which of these ions were present in the solution, which were absent, and for which ones no conclusions can be drawn

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Ag', Pb, Hg
Cu, Bi", Cd³; Pb*; Hg²,H;AsO;", AsO, , Sb", Sn, Sn
Al", Fe", Fe", Co", Ni²', Cr", Zn²“, Mn²'
Ba, Ca, Mg*
| Na", K', NH,
Add H,S,
0.2 M HCI
Add (NH,),S,
pH 8
Add (NH,);HPO,
NH,
Add 6 M HCI
Remaining
cations
Remaining
cations
Remaining
cations
Group 5-Alkali metal
ions and NH,":
Na, K, NH,
Precipitàte
V Precipitate
Precipitate
Precipitate
Group 2-Acid-insoluble
sulfides: Cus, Bi, S, Cds, PbS,
HgS, As-S, Sb,S, SnS
Group 3-Base-insoluble sulfides
and hydroxides: Al(OH), Fe(OH),
Cr(OH), ZnS, Nis, Cos, MnS
Group 4-Insoluble
phosphates: Ba-(PO
Group 1-
Insoluble chlorides:
Ca(PO,, MENH,PO,
ABCI, Hg,Cl, PBCI,
Some ions that are soluble in all of the test solutions can still be identified based on flame tests. Certain ions impart characteristic color to the flame.
Metal cation Flame color
Li
red
Na
yellow
K
purple
Part A
A solution contains some or all of the ions Cu+, AP+, K*, Ca2+, Ba?+, Pb?+ and NH,. The following tests were performed, in order, on the solution.
1. Addition of 6 M HCl produced no reaction.
2. Addition of H,S with 02 M HCl produced a black solid.
3. Addition of (NH,),S produced a white solid
4. Addition of (NH,),HPO, in NH3 produced no reaction.
5. The final supernatant when heated produced a purple flame.
Identify which of these ions were present in the solution, which were absent, and for which ones no conclusions can be drawn.
Drag the appropriate items to their respective bins.
> View Available Hint(s)
Reset Help
Ca
Pha Ba NH,
K Cu
AP
Inconclusive
Absent
Present
P Type here to search
Transcribed Image Text:Ag', Pb, Hg Cu, Bi", Cd³; Pb*; Hg²,H;AsO;", AsO, , Sb", Sn, Sn Al", Fe", Fe", Co", Ni²', Cr", Zn²“, Mn²' Ba, Ca, Mg* | Na", K', NH, Add H,S, 0.2 M HCI Add (NH,),S, pH 8 Add (NH,);HPO, NH, Add 6 M HCI Remaining cations Remaining cations Remaining cations Group 5-Alkali metal ions and NH,": Na, K, NH, Precipitàte V Precipitate Precipitate Precipitate Group 2-Acid-insoluble sulfides: Cus, Bi, S, Cds, PbS, HgS, As-S, Sb,S, SnS Group 3-Base-insoluble sulfides and hydroxides: Al(OH), Fe(OH), Cr(OH), ZnS, Nis, Cos, MnS Group 4-Insoluble phosphates: Ba-(PO Group 1- Insoluble chlorides: Ca(PO,, MENH,PO, ABCI, Hg,Cl, PBCI, Some ions that are soluble in all of the test solutions can still be identified based on flame tests. Certain ions impart characteristic color to the flame. Metal cation Flame color Li red Na yellow K purple Part A A solution contains some or all of the ions Cu+, AP+, K*, Ca2+, Ba?+, Pb?+ and NH,. The following tests were performed, in order, on the solution. 1. Addition of 6 M HCl produced no reaction. 2. Addition of H,S with 02 M HCl produced a black solid. 3. Addition of (NH,),S produced a white solid 4. Addition of (NH,),HPO, in NH3 produced no reaction. 5. The final supernatant when heated produced a purple flame. Identify which of these ions were present in the solution, which were absent, and for which ones no conclusions can be drawn. Drag the appropriate items to their respective bins. > View Available Hint(s) Reset Help Ca Pha Ba NH, K Cu AP Inconclusive Absent Present P Type here to search
Part B
Select the reagent that will separate the pairs of ions listed.
Drag each label to the appropriate target.
> View Available Hint(s)
6 M HCI
Ions
Reagent
Ag and Al3
H2S, 0.2 M HCI
Cu and Ca
(NH4)2S, pH 8
Mg and K*
(NH,)2HPO, in NH
Ni? and Co
Cannot be separated
Transcribed Image Text:Part B Select the reagent that will separate the pairs of ions listed. Drag each label to the appropriate target. > View Available Hint(s) 6 M HCI Ions Reagent Ag and Al3 H2S, 0.2 M HCI Cu and Ca (NH4)2S, pH 8 Mg and K* (NH,)2HPO, in NH Ni? and Co Cannot be separated
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