2) If an unknown Cu*2 solution has an absorbance of .62, a) Find its molarity graphically: A M b) Using the equation of a line: y = mx +b for Beer's Law, A = (slope)M + 0 So, M = A/slope Measure the slope from your graph: A Ay Ax M

2) If an unknown Cu*2 solution has an absorbance of .62, a) Find its molarity graphically: A M b) Using the equation of a line: y = mx +b for Beer's Law, A = (slope)M + 0 So, M = A/slope Measure the slope from your graph: A Ay Ax M

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter7: Equilibria In Multiple-component Systems

Section: Chapter Questions

Problem 7.57E

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Question

Can you help me with the problems on the second page please. The first page is the experimental data, the questions refer to.

1) Use the experimental data and the graph on the next
page to construct a Beer's Law plot.
2) If an unknown Cut2 solution has an absorbance of .62,
a) Find its molarity graphically:
A
M
b) Using the equation of a line:
y = mx +b
for Beer's Law, A = (slope)M + 0
So, M = A/slope
Measure the slope from your graph:
A
Ay
Дх

Beer's Law
Beer's Law Plot
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
.02
.04
.06
.08
.1
Concentration (M)
Experimental Data:
[Cu*2]
.100 M
Absorbance
1.20
.080 M
0.97
.060 M
0.70
.040 M
0.50
.020 M
0.25
.000 M
0.00
Absorbance

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