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Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00 1.000 E Solution B 25.00 100.00 1.25 Solution concentration (M Zn) 1.53×10-3 1.911×10-5 9. The atomic mass of Zn is 65.4094 amu and the molar mass of Zn(NO3)2 is 189.4194 amu. Devise a scheme to calculate the solution concentrations in units of ppm Zn(NO3)2- Calculate the resulting solution concentrations in ppm Zn(NO3)2 for Solutions A-E. Enter your results in Table 1. 10. Devise a scheme to calculate the solution concentrations in units of molarity (M Zn(NO3)2 and M Zn). Calculate the resulting solution concentrations in M Zn(NO3)2 and M Zn for Solutions A-E. Enter your results in Table 1

Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00 1.000 E Solution B 25.00 100.00 1.25 Solution concentration (M Zn) 1.53×10-3 1.911×10-5 9. The atomic mass of Zn is 65.4094 amu and the molar mass of Zn(NO3)2 is 189.4194 amu. Devise a scheme to calculate the solution concentrations in units of ppm Zn(NO3)2- Calculate the resulting solution concentrations in ppm Zn(NO3)2 for Solutions A-E. Enter your results in Table 1. 10. Devise a scheme to calculate the solution concentrations in units of molarity (M Zn(NO3)2 and M Zn). Calculate the resulting solution concentrations in M Zn(NO3)2 and M Zn for Solutions A-E. Enter your results in Table 1

Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter31: Introduction To Analytical Separations
Section: Chapter Questions
Problem 31.1QAP
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Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00 1.000 E Solution B 25.00 100.00 1.25 Solution concentration (M Zn) 1.53×10-3 1.911×10-5
Transcribed Image Text:Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00 1.000 E Solution B 25.00 100.00 1.25 Solution concentration (M Zn) 1.53×10-3 1.911×10-5
9. The atomic mass of Zn is 65.4094 amu and the molar mass of Zn(NO3)2 is 189.4194 amu. Devise a scheme to calculate the solution concentrations in units of ppm Zn(NO3)2- Calculate the resulting solution concentrations in ppm Zn(NO3)2 for Solutions A-E. Enter your results in Table 1. 10. Devise a scheme to calculate the solution concentrations in units of molarity (M Zn(NO3)2 and M Zn). Calculate the resulting solution concentrations in M Zn(NO3)2 and M Zn for Solutions A-E. Enter your results in Table 1
Transcribed Image Text:9. The atomic mass of Zn is 65.4094 amu and the molar mass of Zn(NO3)2 is 189.4194 amu. Devise a scheme to calculate the solution concentrations in units of ppm Zn(NO3)2- Calculate the resulting solution concentrations in ppm Zn(NO3)2 for Solutions A-E. Enter your results in Table 1. 10. Devise a scheme to calculate the solution concentrations in units of molarity (M Zn(NO3)2 and M Zn). Calculate the resulting solution concentrations in M Zn(NO3)2 and M Zn for Solutions A-E. Enter your results in Table 1
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