1 pause ↑ shift pg dn end del Mg2+. Ammonium sulfate is added to the known cation solution and the separation begins. Figure 4 presents an overview of the analysis. In Step 1, Ba2+ is confirmed; in Step 2, Ca2+ is confirmed; and in Step 3, Mg2+ is confirmed. We will begin the cation analysis with a known solution containing Ba2+, Ca2+, and itel) STEP 1 (NH4)2SO4 RE 15 TH GEN Ba2, Ca2, Mg2+ STEP 2 (NH4)2C2O4 Ca2+, Mg2+ Decant BaSO4 ppt HCI STEP 3 NA2HPO4 + NAOH Green Flame Test Mg2+ 3 (CONFIRMS Ba2+) Decant CaC204 ppt НС Brick-Red Flame Test (CONFIRMS Ca2+) 31 Discard supernate HCl and magnesium indicator 3 red litmus NAOH 3/ Blue "Lake" ppt (CONFIRMS Mg²+) blue spot Figure 4 Cation Analysis The systematic separation and identification of Ba2+, Ca2+, and Mg2+ cations in a known solution. Identifying Cations in Solution 78 3. Σ home 4. enter 3. 1 pause 1 shift pg dn end enter del ins alt Refer to Figure 4, and determine which of the following cations are present and absent in Reknown cation solution: Ba2+, Ca2+, and Mg2+ Unknown solution in test tube #1 plus aqueous (NH4)2SO4 gives a white precipitate. The supernate in test tube #1 is poured into test tube #2. • The precipitate in test tube #1 plus HCl gives a green flame test for two seconds. • The solution in test tube #2 plus aqueous (NH4)2C204 gives no reaction. • The solution in test tube #2 is poured into test tube #3. • Test tube #3 plus aqueous N22HPO4 and NaOH gives a white precipitate. • The precipitate dissolves in HCI, and magnesium indicator is added. • The solution is made basic with aqueous NAOH and centrifuged. • A blue "lake," that is a clear blue gel, is observed at the bottom of the test tube. Cation(s) absent Cation(s) present rforming this experiment? 2N
1 pause ↑ shift pg dn end del Mg2+. Ammonium sulfate is added to the known cation solution and the separation begins. Figure 4 presents an overview of the analysis. In Step 1, Ba2+ is confirmed; in Step 2, Ca2+ is confirmed; and in Step 3, Mg2+ is confirmed. We will begin the cation analysis with a known solution containing Ba2+, Ca2+, and itel) STEP 1 (NH4)2SO4 RE 15 TH GEN Ba2, Ca2, Mg2+ STEP 2 (NH4)2C2O4 Ca2+, Mg2+ Decant BaSO4 ppt HCI STEP 3 NA2HPO4 + NAOH Green Flame Test Mg2+ 3 (CONFIRMS Ba2+) Decant CaC204 ppt НС Brick-Red Flame Test (CONFIRMS Ca2+) 31 Discard supernate HCl and magnesium indicator 3 red litmus NAOH 3/ Blue "Lake" ppt (CONFIRMS Mg²+) blue spot Figure 4 Cation Analysis The systematic separation and identification of Ba2+, Ca2+, and Mg2+ cations in a known solution. Identifying Cations in Solution 78 3. Σ home 4. enter 3. 1 pause 1 shift pg dn end enter del ins alt Refer to Figure 4, and determine which of the following cations are present and absent in Reknown cation solution: Ba2+, Ca2+, and Mg2+ Unknown solution in test tube #1 plus aqueous (NH4)2SO4 gives a white precipitate. The supernate in test tube #1 is poured into test tube #2. • The precipitate in test tube #1 plus HCl gives a green flame test for two seconds. • The solution in test tube #2 plus aqueous (NH4)2C204 gives no reaction. • The solution in test tube #2 is poured into test tube #3. • Test tube #3 plus aqueous N22HPO4 and NaOH gives a white precipitate. • The precipitate dissolves in HCI, and magnesium indicator is added. • The solution is made basic with aqueous NAOH and centrifuged. • A blue "lake," that is a clear blue gel, is observed at the bottom of the test tube. Cation(s) absent Cation(s) present rforming this experiment? 2N
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Transcribed Image Text:1
pause
↑ shift
pg dn
end
del
Mg2+. Ammonium sulfate is added to the known cation solution and the separation begins.
Figure 4 presents an overview of the analysis. In Step 1, Ba2+ is confirmed; in Step 2, Ca2+ is
confirmed; and in Step 3, Mg2+ is confirmed.
We will begin the cation analysis with a known solution containing Ba2+, Ca2+, and
itel)
STEP 1
(NH4)2SO4
RE 15
TH GEN
Ba2, Ca2, Mg2+
STEP 2
(NH4)2C2O4
Ca2+, Mg2+
Decant
BaSO4 ppt
HCI
STEP 3
NA2HPO4 + NAOH
Green Flame Test
Mg2+
3
(CONFIRMS Ba2+)
Decant
CaC204 ppt
НС
Brick-Red Flame Test
(CONFIRMS Ca2+)
31
Discard
supernate
HCl and magnesium
indicator
3
red litmus
NAOH
3/
Blue "Lake" ppt
(CONFIRMS Mg²+)
blue spot
Figure 4 Cation Analysis The systematic separation and identification of
Ba2+, Ca2+, and Mg2+ cations in a known solution.
Identifying Cations in Solution
78
3.
Σ
Transcribed Image Text:home
4.
enter
3.
1
pause
1 shift
pg dn
end
enter
del
ins
alt
Refer to Figure 4, and determine which of the following cations are present and absent in
Reknown cation solution: Ba2+, Ca2+, and Mg2+
Unknown solution in test tube #1 plus aqueous (NH4)2SO4 gives a white precipitate.
The supernate in test tube #1 is poured into test tube #2.
• The precipitate in test tube #1 plus HCl gives a green flame test for two seconds.
• The solution in test tube #2 plus aqueous (NH4)2C204 gives no reaction.
• The solution in test tube #2 is poured into test tube #3.
• Test tube #3 plus aqueous N22HPO4 and NaOH gives a white precipitate.
• The precipitate dissolves in HCI, and magnesium indicator is added.
• The solution is made basic with aqueous NAOH and centrifuged.
• A blue "lake," that is a clear blue gel, is observed at the bottom of the test tube.
Cation(s) absent
Cation(s) present
rforming this experiment?
2N
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