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13) To determine the number of moles of Cu in the sample, the students measured the absorbance of known concentrations of Cu(NO3)2(aq) using a spectrophotometer. A cuvette filled with some of the solution produced from the sample was also tested. The data recorded by one of the students are shown in the table above. On the basis of the data provided, which of the following is a possible error that the student made? O The Cu(NO,)2(aq) from the sample was not diluted properly. O The spectrophotomer was originally set to an inappropriate wavelength, causing the absorbance to vary unpredictably. O The student labeled the cuvettes incorrectly, reversing the labels of two of the solution. The spectrophotometer was set to read transmittance instead of absorbance.

13) To determine the number of moles of Cu in the sample, the students measured the absorbance of known concentrations of Cu(NO3)2(aq) using a spectrophotometer. A cuvette filled with some of the solution produced from the sample was also tested. The data recorded by one of the students are shown in the table above. On the basis of the data provided, which of the following is a possible error that the student made? O The Cu(NO,)2(aq) from the sample was not diluted properly. O The spectrophotomer was originally set to an inappropriate wavelength, causing the absorbance to vary unpredictably. O The student labeled the cuvettes incorrectly, reversing the labels of two of the solution. The spectrophotometer was set to read transmittance instead of absorbance.

Chemistry
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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13) To determine the number of moles of Cu in the sample, the students measured the absorbance of known concentrations of Cu(NO3)2(aq) using a spectrophotometer. A cuvette filled with some of the solution produced from the sample was also tested. The data recorded by one of the students are shown in the table above. On the basis of the data provided, which of the following is a possible error that the student made? O The Cu(NO,)2(aq) from the sample was not diluted properly. O The spectrophotomer was originally set to an inappropriate wavelength, causing the absorbance to vary unpredictably. O The student labeled the cuvettes incorrectly, reversing the labels of two of the solution. The spectrophotometer was set to read transmittance instead of absorbance.
Transcribed Image Text:13) To determine the number of moles of Cu in the sample, the students measured the absorbance of known concentrations of Cu(NO3)2(aq) using a spectrophotometer. A cuvette filled with some of the solution produced from the sample was also tested. The data recorded by one of the students are shown in the table above. On the basis of the data provided, which of the following is a possible error that the student made? O The Cu(NO,)2(aq) from the sample was not diluted properly. O The spectrophotomer was originally set to an inappropriate wavelength, causing the absorbance to vary unpredictably. O The student labeled the cuvettes incorrectly, reversing the labels of two of the solution. The spectrophotometer was set to read transmittance instead of absorbance.
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