Measure the absorbance of the following solutions at the wavelength of the maximum absorption of K₂Cr₂O7 in 1M H₂SO4 and K₂Cr₂O7 in 1M NaOH. K₂Cr₂O7 in 1M H₂SO4 Concentration, M 1.0 x 10-4 2.0 x 10-4 Unknown Abs λmax 1M H₂SO4 350 0.023 0.049 0.078 nm Abs λmax 1M NaOH 368 0.015 0.035 0.058 nm K₂Cr₂O7 in 1M NaOH Abs λmax 1M NaOH Abs λmax 1M H₂SO4 350 0.067 0.139 0.179 nm 368 0.115 0.233 0.297 nm
Measure the absorbance of the following solutions at the wavelength of the maximum absorption of K₂Cr₂O7 in 1M H₂SO4 and K₂Cr₂O7 in 1M NaOH. K₂Cr₂O7 in 1M H₂SO4 Concentration, M 1.0 x 10-4 2.0 x 10-4 Unknown Abs λmax 1M H₂SO4 350 0.023 0.049 0.078 nm Abs λmax 1M NaOH 368 0.015 0.035 0.058 nm K₂Cr₂O7 in 1M NaOH Abs λmax 1M NaOH Abs λmax 1M H₂SO4 350 0.067 0.139 0.179 nm 368 0.115 0.233 0.297 nm
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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How to determine the molar absorptivity of chromate ion at the wavelength of maximum absorption of the dichromate (1M H2SO4), Ɛ11 and Ɛ12, and at the wavelength of maximum absorption of the chromate (1M NaOH), Ɛ21 and Ɛ22?
Equations:
K2Cr2O7 in 1M H2SO4: 2CrO4 2- + 2H+ ---> Cr2O7 2- + H2O
K2Cr2O7 in 1M NaOH: Cr2O7 2- + H2O ---> 2CrO4 2- + 2H+
Transcribed Image Text:Measure the absorbance of the following solutions at the wavelength of the maximum
absorption of K₂Cr₂O7 in 1M H₂SO4 and K₂Cr₂O7 in 1M NaOH.
K₂CR2O7 in 1M H₂SO4
Concentration,
M
1.0 x 10-4
2.0 x 10-4
Unknown
Abs
λmax
1M H₂SO4
350
0.023
0.049
0.078
nm
Abs
λmax
1M NaOH
368
0.015
0.035
0.058
nm
K₂Cr2O7 in 1M NaOH
Abs
λmax
1M NaOH
Abs
λmax
1M H₂SO4
350
0.067
0.139
0.179
nm
368
0.115
0.233
0.297
nm
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