Chromate-dichromate system 1. Prepare a clean spot plate and label four wells. Place 5 drops of 0. 10 M K¸CrO̟ into wells 1 and 2, and 5 drops of 0. 10 M K,Cr,0, into wells 3 and 4. 2. Add 2 drops of 2. 0 M H,SO̟ into wells 1 and 3. 3. Add 2 drops of 2. 0 M NaOH into wells 2 and 4. 4. Observe the colors of the solutions. Well 1 2 3 Color of solution Predominant species responsible for color Give the reaction equilibrium that describes this system:

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter33: Automated Methods Of Analysis
Section: Chapter Questions
Problem 33.5QAP: Give the advantages and disadvantages of sequential injection analyzers compared to traditional flow...
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Chemical
Concentration
Risk phrases
Safety phrases
Feso.
0.10 M
None listed
None listed
AgNO,
0.10 M
36/38, 50/53
26,57,60
KĻF¢(CN),
None listed
0.10 M
None listed
KSCN
0.10 M
None listed
None listed
HCI
12.1 M (concentrated)
34,37
25,45
Cuso,
None listed
0.10 M
None listed
NH,
1м
None listed
None listed
K,Cro,
0.10 M
25,36/37/38,43,46,49
None listed
K_Cr.0,
0.10 M
45,46,20/21,51/53
53,36/37,45,61
H sO,
2.0 M
None listed
None listed
NAOH
2.0 M
None listed
None listed
FeCl,
0.10 M
22,38,41
26,39
CoCl,
0.10 M
49,60,68,42/43,51/53
23,36/37,45,61
Transcribed Image Text:Chemical Concentration Risk phrases Safety phrases Feso. 0.10 M None listed None listed AgNO, 0.10 M 36/38, 50/53 26,57,60 KĻF¢(CN), None listed 0.10 M None listed KSCN 0.10 M None listed None listed HCI 12.1 M (concentrated) 34,37 25,45 Cuso, None listed 0.10 M None listed NH, 1м None listed None listed K,Cro, 0.10 M 25,36/37/38,43,46,49 None listed K_Cr.0, 0.10 M 45,46,20/21,51/53 53,36/37,45,61 H sO, 2.0 M None listed None listed NAOH 2.0 M None listed None listed FeCl, 0.10 M 22,38,41 26,39 CoCl, 0.10 M 49,60,68,42/43,51/53 23,36/37,45,61
Chromate-dichromate system
1. Prepare a clean spot plate and label four wells. Place 5 drops of 0. 10 M K,Cro.
into wells 1 and 2, and 5 drops of 0. 10 M K¸Cr,0, into wells 3 and 4.
2. Add 2 drops of 2. 0 M H,SO̟ into wells 1 and 3.
3. Add 2 drops of 2.0 M NaOH into wells 2 and 4.
4. Observe the colors of the solutions.
Well
1
3
4
Color of solution
Predominant species
responsible for color
Give the reaction equilibrium that describes this system:
Transcribed Image Text:Chromate-dichromate system 1. Prepare a clean spot plate and label four wells. Place 5 drops of 0. 10 M K,Cro. into wells 1 and 2, and 5 drops of 0. 10 M K¸Cr,0, into wells 3 and 4. 2. Add 2 drops of 2. 0 M H,SO̟ into wells 1 and 3. 3. Add 2 drops of 2.0 M NaOH into wells 2 and 4. 4. Observe the colors of the solutions. Well 1 3 4 Color of solution Predominant species responsible for color Give the reaction equilibrium that describes this system:
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