Chemistry, 08.12.2021 14:00 hannahkharel2
(5) For a final exercise, using the absorbance spectrum of bromocresol green at various pH values
pH -2.12
2
2.4
Amax = 620 nm
1.8
2.64
2.94
1.6 amax = 435 nm
3.2
1.4
-3.8
1.2
4.13
1 -
4.6
4.9
0.8
5.17
0.6
5.9
Absorbance
0.4
0.2
0
400
450
500
550
600
650
700
Wavelength / nm
shown below, describe to the reader what they are observing and how an absorbance titration would
allow for a more accurate calculation of the pk, of bromocresol green. Recall that molecules absorb
light, and instruments and humans see transmitted light (color opposites). The expectation is a
paragraph of at least 120 words in complete sentences with all references cited.
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(5) For a final exercise, using the absorbance spectrum of bromocresol green at various pH values...
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