A student is instructed to determine the concentration of a solution of CoCl2 based on absorption of light (spectrometric/colorimetric method). The student is provided with a 0.10 M solution of CoCl₂ with which to prepare standard solutions with concentrations of 0.020 M, 0.040 M, 0.060 M and 0.080 M.

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Due: Wed., 3/1/23
AP Chemistry
11. A student is instructed to determine the concentration of a solution of CoCl2₂ based on
absorption of light (spectrometric/colorimetric method). The student is provided with a 0.10
M solution of CoCl₂ with which to prepare standard solutions with concentrations of 0.020 M,
0.040 M, 0.060 M and 0.080 M.
Transcribed Image Text:Name: Due: Wed., 3/1/23 AP Chemistry 11. A student is instructed to determine the concentration of a solution of CoCl2₂ based on absorption of light (spectrometric/colorimetric method). The student is provided with a 0.10 M solution of CoCl₂ with which to prepare standard solutions with concentrations of 0.020 M, 0.040 M, 0.060 M and 0.080 M.
(d) Beer's Law is an expression that includes three factors that determine the amount of light that
passes through a solution. Identify two of these factors.
(e) The student handles the sample container (e.g., test tube or cuvette) that holds the unknown
solution and leaves fingerprints in the path of the light beam. How will this affect the
calculated concentration of the unknown? Explain your answer.
(f) Why is this method of determining the concentration of CoCl₂ solution appropriate, whereas
using the same method for measuring the concentration of NaCl solution would not be
appropriate?
Transcribed Image Text:(d) Beer's Law is an expression that includes three factors that determine the amount of light that passes through a solution. Identify two of these factors. (e) The student handles the sample container (e.g., test tube or cuvette) that holds the unknown solution and leaves fingerprints in the path of the light beam. How will this affect the calculated concentration of the unknown? Explain your answer. (f) Why is this method of determining the concentration of CoCl₂ solution appropriate, whereas using the same method for measuring the concentration of NaCl solution would not be appropriate?
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