Spectroscopy and Beer’s Law: Post Lab
7. Use the spectrum above to answer the questions they need to be correct.
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Spectroscopy and Beer’s Law:
Post Lab
7. Use the spectrum above to answer
the questions they...
Questions 1. Consider the calibration graph and the absorption spectrum for solutions of metal ion, M...
Questions 1. Consider the calibration graph and the absorption spectrum for solutions of metal ion, M * Absorption Spectrum for M Calibration Curve for M 0.8 0.7 1.2 0.6 1 0.5 S 0.8 0.4 0.6 0.3 0.4 0.2 0.1 0.2 0- 0 0.5 0.4 0.3 0.2 0.1 400 450 500 550 600 650 700 [M*1 (Molar) (入) nm a) At what wavelength was the calibration curve obtained? Explain your answer. b) Use the calibration curve to calculate the concentration (M)...
1.2 1.0 0.8 0.6 0.4+ 0.2 0+ 300 350 400 450 500 550 600 650 700 Wavelength (nm) The absorption spectrum of a certai...
1.2 1.0 0.8 0.6 0.4+ 0.2 0+ 300 350 400 450 500 550 600 650 700 Wavelength (nm) The absorption spectrum of a certain red dye is shown above. If a student analyzing the same concentration of this dye neglected to wipe fingerprints off the cuvette before placing it in the spectrophotometer, how would the absorption curve be affected? Absorbance
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and Beer’s Law. Use the “LAB : HOW TO…” link from the class website if you need help with how to use balance, Bunsen burner… and such. Introduction: You may write this information in your lab notebook for your own reference. It can’t be cut and pasted. Different solutions have different spectral properties. In this portion of the experiment those properties will be utilized to...
(5 questions) Data: Consider the data below for a Beer's Law calibration curve for an aqueous...
(5 questions) Data: Consider the data below for a Beer's Law calibration curve for an aqueous orange nye solution that has mas 450 nm. The solutions used were translucent. The data was collected using a 1.20cm wide test tube cuvette, using 2 = 450 nm. Trial Concentration (M) Absorbance Percent Transmittance 1 0 .0030 0.153 70.3 0.0060 0.312 48.8 0.0090 0.465 34.3 0.0120 0.627 23.6 0.0150 0.771 16.9 For each of the following errors/changes, indicate whether a repeat of the...
Number 2 and 4 please, thanks! BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions....
Number 2 and 4 please, thanks!
BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions. 1. what is-for the metal complex Cu(C,N,H8),SO4 from your/ class data? 2. Using the known absorbance, pathlength, and concentration of the stock solution, calculate the extinction coefficient (e) for Cu(C,N,H),so, at numerical calculations ma Show all work for 3. Wh at was the absorbance of your unknown solution? Which concentration does this correspond to on your graph? 4. A type of food coloring has...
Data: Consider the data below for a Beer's Law calibration curve for an aqueous orange dye solution that has 2. mx4...
Data: Consider the data below for a Beer's Law calibration curve for an aqueous orange dye solution that has 2. mx450 nm. The solutions used were translucent. The data was collected using a 1.20cm wide test tube cuvette, using 2. = 450 nm. Trial Concentration (M) Absorbance P ercent Transmittance 1 0.0030 0.153 70.3 2 0 .0060 0.312 48.8 3 0 .0090 0.465 34.3 0.0120 0.627 23.6 0.0150 0.771 16.9 For each of the following errors/changes, indicate whether a repeat...
View the attachment and answer the following questions: A. The Beer's law relationship was established by...
View the attachment and answer the following questions:
A. The Beer's law relationship was established by measuring the
absorbance of:
A) Several solutions at one wavelength.
B) One solution at several wavelengths.
C) Several solutions over a range of wavelengths.
D) One solution at one wavelength.
B. The y-intercept in Graph B has:
A) 3 decimal places because the Spec 20 displayed 3 decimal
places for each reading.
B) 3 decimal places because there are 3 significant figures in
the...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate. 1. An amine complex of cobalt(III) is yellow-orange and has a box of 475 nm. The standard curve below is for a set of standards measured at me in a 1.8 cm cell. Use it to answer the questions that follow. 0.8 0.7 0.6 0.5 Ab sorbance 0.4 0.3 0.2 0.1 0 0 0.05 0.1 02 0.25 0.3 0.35 0.15...
Prelaboratory assignment Exp. 4 Beer’s Law 1.Calculate the Concentration of the Crystal Violet Solutions in Table...
Prelaboratory assignment Exp. 4 Beer’s Law
1.Calculate the Concentration of the Crystal Violet Solutions in
Table 1 of the Procedureusing Vinitial x Minitial = Vdiluted x
Mdiluted (Note: Vdiluted = 15 mL). Record the concentrationsin
Table 1 AND in the Data table in the report sheet.
2.Plot the following data as absorbance vs concentration of X in
excel
Absorbance, A Molar Concentration of X
0.045 3.0 x 10-4 mol/L
0.097 6.2 x 10-4 mol/L
0.14 9.0 x 10-4 mol/L...
POST LABORATORY QUESTIONS solution appears to be orange, what range of wavelength would you use for...
POST LABORATORY QUESTIONS solution appears to be orange, what range of wavelength would you use for analysis of the solution? I. a. Ifa b. How about if the solution was green-blue? 2, a. what absorbance corresponds to a percent transmittance of 59.6 % T? b. What is the percent transmittance for a solution that has an absorbance of 0.49? 3. At a wavelength of 510 nm a 0.12 M solution of CoCla gave a percent transmittance value of28.9 %. The...
Questions 1. Consider the calibration graph and the absorption spectrum for solutions of metal ion, M * Absorption Spectrum for M Calibration Curve for M 0.8 0.7 1.2 0.6 1 0.5 S 0.8 0.4 0.6 0.3 0.4 0.2 0.1 0.2 0- 0 0.5 0.4 0.3 0.2 0.1 400 450 500 550 600 650 700 [M*1 (Molar) (入) nm a) At what wavelength was the calibration curve obtained? Explain your answer. b) Use the calibration curve to calculate the concentration (M)...
1.2 1.0 0.8 0.6 0.4+ 0.2 0+ 300 350 400 450 500 550 600 650 700 Wavelength (nm) The absorption spectrum of a certain red dye is shown above. If a student analyzing the same concentration of this dye neglected to wipe fingerprints off the cuvette before placing it in the spectrophotometer, how would the absorption curve be affected? Absorbance
(5 questions) Data: Consider the data below for a Beer's Law calibration curve for an aqueous orange nye solution that has mas 450 nm. The solutions used were translucent. The data was collected using a 1.20cm wide test tube cuvette, using 2 = 450 nm. Trial Concentration (M) Absorbance Percent Transmittance 1 0 .0030 0.153 70.3 0.0060 0.312 48.8 0.0090 0.465 34.3 0.0120 0.627 23.6 0.0150 0.771 16.9 For each of the following errors/changes, indicate whether a repeat of the...
Number 2 and 4 please, thanks!
BEER'S LAW EXPERIMENT 8 POST-LAB QUESTIONS Answer the following questions. 1. what is-for the metal complex Cu(C,N,H8),SO4 from your/ class data? 2. Using the known absorbance, pathlength, and concentration of the stock solution, calculate the extinction coefficient (e) for Cu(C,N,H),so, at numerical calculations ma Show all work for 3. Wh at was the absorbance of your unknown solution? Which concentration does this correspond to on your graph? 4. A type of food coloring has...
Data: Consider the data below for a Beer's Law calibration curve for an aqueous orange dye solution that has 2. mx450 nm. The solutions used were translucent. The data was collected using a 1.20cm wide test tube cuvette, using 2. = 450 nm. Trial Concentration (M) Absorbance P ercent Transmittance 1 0.0030 0.153 70.3 2 0 .0060 0.312 48.8 3 0 .0090 0.465 34.3 0.0120 0.627 23.6 0.0150 0.771 16.9 For each of the following errors/changes, indicate whether a repeat...
View the attachment and answer the following questions:
A. The Beer's law relationship was established by measuring the
absorbance of:
A) Several solutions at one wavelength.
B) One solution at several wavelengths.
C) Several solutions over a range of wavelengths.
D) One solution at one wavelength.
B. The y-intercept in Graph B has:
A) 3 decimal places because the Spec 20 displayed 3 decimal
places for each reading.
B) 3 decimal places because there are 3 significant figures in
the...
Post lab: Show all calculation to receive credit for an answer. Be sure to indicate your final answer where appropriate. 1. An amine complex of cobalt(III) is yellow-orange and has a box of 475 nm. The standard curve below is for a set of standards measured at me in a 1.8 cm cell. Use it to answer the questions that follow. 0.8 0.7 0.6 0.5 Ab sorbance 0.4 0.3 0.2 0.1 0 0 0.05 0.1 02 0.25 0.3 0.35 0.15...
Prelaboratory assignment Exp. 4 Beer’s Law
1.Calculate the Concentration of the Crystal Violet Solutions in
Table 1 of the Procedureusing Vinitial x Minitial = Vdiluted x
Mdiluted (Note: Vdiluted = 15 mL). Record the concentrationsin
Table 1 AND in the Data table in the report sheet.
2.Plot the following data as absorbance vs concentration of X in
excel
Absorbance, A Molar Concentration of X
0.045 3.0 x 10-4 mol/L
0.097 6.2 x 10-4 mol/L
0.14 9.0 x 10-4 mol/L...
POST LABORATORY QUESTIONS solution appears to be orange, what range of wavelength would you use for analysis of the solution? I. a. Ifa b. How about if the solution was green-blue? 2, a. what absorbance corresponds to a percent transmittance of 59.6 % T? b. What is the percent transmittance for a solution that has an absorbance of 0.49? 3. At a wavelength of 510 nm a 0.12 M solution of CoCla gave a percent transmittance value of28.9 %. The...
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