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
I am allowed to
Work with someone but due to covid I have to work virtually and I am lost ....I provided the data that I have to go by
Use the graphs in the file to determine the concentration of the unknown solution and to answer the other questions from the lab pack.
Transcribed Image Text:Spectroscopy: Determination of Concentration Using Beer's Law
Data Table: Record your observations and any test results.
A. Visible wavelengths Introduction (Optional)
Wavelength (nm)
Observed Color
660
600
560
440
400
![We start with 0.40 M Cuso,
how much do we need to make
each solution?
Solution
Conc (M)
Absorbance
1
0.08
0.16
024
Beer's Law
0.32
0.40
Unknon
We start with 0.40 M Cuso,
how much do we need to make
L
each solution?
Beer's Law
M,V, - MV
A = ɛlc
(0.40M)V, - (0.08M)(10 ml)
A = kc
V,-2 ml
Solution
Conc (M)
Absorbance
0.08 (2 m)
2
0.16(4 m
024 6 m
032
T
0.40 (10 m)
Unknown
3
024
0.32
0.40
Unknown
We start with 0.40 M Cuso,
how much do we need to make
each solution?
620rn
बै]2
629 nm
(0.40M)V,- (0.0BM)(10 ml)
V,-2 ml
O ABS
Solution
Conc (M)
Absorbance
0.08 2 m)
0.16(4 m
2
024 (6 m
032
T
ATIC
4
0.40 (10 m)
Unknown
Solution
Conc (M
Absorbance
0.08 2 m)
0.130
Carion Grah
0.16 4 m)
0.265
0.24 6 m
032 m)
040 (10 m
0618
0.750
Unon
0.191
V,2 ml
Solution
Conc (M)
Absorbance
y1924 0151
CALIBRATION GRAPH
0.08 (2 m)
A-1.9246conc-0151
0.16 (4 ml)
0.24 (6 mL)
Unknown absorbance is 0.91
Selve for Concentration
032 (8 m)
0.40 (10 ml)
1. Use line equation
2. Solve graphically
Unknown
Concentration is0.20MSolve
for Absorbance
Conc (M)
Absorbance
1. Ue ine equation
Solution
2. Selve graphicaly
1
0.08 (2 m)
0.130
Calration Graph
2
0.16 (4 m
0265
3
0.24 (6 m
0.468
4
0.32 (8 m)
0618
Show all work below and on
aph. Submit in Dropbox
0.40 (10 ml)
0.750
CALIBRATION GRAPH
Unknown
0.391
Determine Cu
concentration (M)
y- mx + b
A= mM + b
Also illustrate on graph
CONENTOM
y1.9246(x0151](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F63a6b806-852f-46a9-81fb-cf33a0130a1c%2F6d617ba9-fe59-41e1-af87-68b8995ccb3f%2Ffyf28lo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:We start with 0.40 M Cuso,
how much do we need to make
each solution?
Solution
Conc (M)
Absorbance
1
0.08
0.16
024
Beer's Law
0.32
0.40
Unknon
We start with 0.40 M Cuso,
how much do we need to make
L
each solution?
Beer's Law
M,V, - MV
A = ɛlc
(0.40M)V, - (0.08M)(10 ml)
A = kc
V,-2 ml
Solution
Conc (M)
Absorbance
0.08 (2 m)
2
0.16(4 m
024 6 m
032
T
0.40 (10 m)
Unknown
3
024
0.32
0.40
Unknown
We start with 0.40 M Cuso,
how much do we need to make
each solution?
620rn
बै]2
629 nm
(0.40M)V,- (0.0BM)(10 ml)
V,-2 ml
O ABS
Solution
Conc (M)
Absorbance
0.08 2 m)
0.16(4 m
2
024 (6 m
032
T
ATIC
4
0.40 (10 m)
Unknown
Solution
Conc (M
Absorbance
0.08 2 m)
0.130
Carion Grah
0.16 4 m)
0.265
0.24 6 m
032 m)
040 (10 m
0618
0.750
Unon
0.191
V,2 ml
Solution
Conc (M)
Absorbance
y1924 0151
CALIBRATION GRAPH
0.08 (2 m)
A-1.9246conc-0151
0.16 (4 ml)
0.24 (6 mL)
Unknown absorbance is 0.91
Selve for Concentration
032 (8 m)
0.40 (10 ml)
1. Use line equation
2. Solve graphically
Unknown
Concentration is0.20MSolve
for Absorbance
Conc (M)
Absorbance
1. Ue ine equation
Solution
2. Selve graphicaly
1
0.08 (2 m)
0.130
Calration Graph
2
0.16 (4 m
0265
3
0.24 (6 m
0.468
4
0.32 (8 m)
0618
Show all work below and on
aph. Submit in Dropbox
0.40 (10 ml)
0.750
CALIBRATION GRAPH
Unknown
0.391
Determine Cu
concentration (M)
y- mx + b
A= mM + b
Also illustrate on graph
CONENTOM
y1.9246(x0151
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