Test Tube Number Cobalt Chloride Concentration (mol/mL) Absorbance at 510 nm 1 0.000 0.000 2 0.009 0.042 3 0.018 0.92 4 0.027 0.139 5 6 0.036 0.045 0.190 0.236 7 (Unknown) 0.151 1. what is the concentration of unknown cobalt chloride solution? 2. why is the absorbance at the absorption peak ?

Test Tube Number Cobalt Chloride Concentration (mol/mL) Absorbance at 510 nm 1 0.000 0.000 2 0.009 0.042 3 0.018 0.92 4 0.027 0.139 5 6 0.036 0.045 0.190 0.236 7 (Unknown) 0.151 1. what is the concentration of unknown cobalt chloride solution? 2. why is the absorbance at the absorption peak ?

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions

Section: Chapter Questions

Problem 77PS

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Question

Test Tube Number	Cobalt Chloride Concentration (mol/mL)	Absorbance at *510 nm*

1	0.000	0.000
2	0.009	0.042
3	0.018	0.92
4	0.027	0.139
5 6	0.036 0.045	0.190 0.236
7	(Unknown)	0.151

1. what is the concentration of unknown cobalt chloride solution?

2. why is the absorbance at the absorption peak ?

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