Report the absorbance reading obtained for your TZ unknown at 430 nm. Using the calculated effective molar absorptivity of TZ from the Beer's Law plot you already generated, calculate the concentration of your TZ unknown. TZ Unknown Absorbance at 430 nm Concentration of TZ Unknown (M) 0.749 Unrounded 24.9666 Rounded 3
Report the absorbance reading obtained for your TZ unknown at 430 nm. Using the calculated effective molar absorptivity of TZ from the Beer's Law plot you already generated, calculate the concentration of your TZ unknown. TZ Unknown Absorbance at 430 nm Concentration of TZ Unknown (M) 0.749 Unrounded 24.9666 Rounded 3
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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Unrounded | Rounded | |
---|---|---|
ε∗,L/μmolε∗,L/μmol | 0.0259825 | 0.0260 |
heres data:
TZ # | Concentration | Absorbance at 430 nmnm |
---|---|---|
1 | 33.6480 | 0.931 |
2 | 25.2360 | 0.757 |
3 | 16.8420 | 0.210 |
4 | 8.41200 | 0.137 |
5 | 4.20600 | 0.122 |

Transcribed Image Text:Report the absorbance reading obtained for your TZ unknown at 430 nm. Using the calculated effective molar absorptivity of TZ from
the Beer's Law plot you already generated, calculate the concentration of your TZ unknown.
TZ Unknown Absorbance at 430 nm
Concentration of TZ Unknown (M)
III. 7.
We will now deter
determined by co
the dispensary sta
Percent Error of
24.9666
X Incorrect
0.749
Unrounded
24.9666 A
SUBMIT
SOLVE
To calculate the concentration of your unknown,
remember to use the linear trendline obtained from the
Beer's Law plot. The absorbance of the unknown is
your y-value, and you are solving for your
concentration (or the x-value).
Try again.
Rounded
3
unknown concentration. Your percent error is
oncentration of that sample (which is known by
concentration
x 100

Transcribed Image Text:molar absorptivity (represented by the slope of the linear trendline), which has units of μmol in this case.
Absorbance
0.8
0.6
0.4
0.2
1
I
LO
5
Beer's Law Plot of TZ at 430 nm
10
15
430 nm: y = 0.0259825 x
20
Concentration (μM)
25
30
35
П
+
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