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Question 3 (1 point) A student plots a graph of absorbance on the y axis and...
5 A calibration curve used in UV/VIS spectroscopy plots concentration on the y-axis and absorbance on...
5
A calibration curve used in UV/VIS spectroscopy plots concentration on the y-axis and absorbance on the x-axis. O A) True OB) False Question 5 (2 points) A working standard is prepared by taking 38.00 mL of a 500.0 ppm stock solution and diluting it tos a final volume of 650.0 mL. Calculate the ppm concentration of the working solution. Provide your answer to two places after the decimal and without units. Your Answer: Answer Submit Out 2afactione ad
0 0.051 6.4 0.164 12.9 0.28 19.3 0.382 25.7 0.499 Graph Absorbance (y-axis) vs Concentration (x-axis)....
0 0.051 6.4 0.164 12.9 0.28 19.3 0.382 25.7 0.499 Graph Absorbance (y-axis) vs Concentration (x-axis). What is the slope of the line? What is the concentration of the solution if the solution is 0.317? what would be the Absorptivity (ɛ) of the substance if the path length of the cuvette, b = 1 cm?
Need a graph with the absorbance and the concentration plotted with the x and y axis...
Need a graph with the absorbance and the concentration plotted with
the x and y axis the unknown is .508 absorbance and the the unknown
concentration is 24.19 . With these values beers gas laws
15 EXPERIMENT 45 Report Sheet 1. Unknown number 2. Data table Tube # | Dye olume (mL) | DyeconcentrationhW | Ahorhance (520mm, 0 c00 20 32698 | 85-1 | :779 :132 46.8 3. Unknown absorbance value 4 Uniknown concentration from the graph
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the...
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the line of best fit from their calibration curve was y = 3.612x104 X+0.0060. If the original concentration of the student's unknown sample of Biomarker X was 8.25x104 M, what is the expected percent transmittance of the diluted unknown sample? Percent Transmittance: Show Your Calculations Below: A. Concentration of Biomarker by Spectrophotometry: Concentration of Stock Biomarker Solution (M): 1.1754 10M **Note: Measure the Percent Transmittance...
Laboratory Questions: Spectrophotometry and Beer's Law 1. In preparing a calibration curve for a certain colored...
Laboratory Questions: Spectrophotometry and Beer's Law 1. In preparing a calibration curve for a certain colored species, a student obtained the following data: Concentration Percent Transmittance Absorbance 1.00 x 10M 87.1% 2.00 x 10-M 79.4% 4.00 x 10M 60.3% 6.00 x 10-'M 43.7% 1.00 x 10-2M 26.3% a. Complete the table above by finding the absorbance for each solution. b. Plot the data on the attached piece of graph paper. Plot A vs. conc. c. Determine the absorbance and the...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
1 points Save Answer QUESTION 25 A student finds the percent transmittance and the absorbance of...
1 points Save Answer QUESTION 25 A student finds the percent transmittance and the absorbance of a 0.10 M solution at different wavelengths, and the two graphs are presented below. 0 560 60 W ength 400 440 480 5.0 Wavelength (m) What is the optimum wavelength for the analysis? a. 510 nm 0 0 | 튼튼 0 1 points Save Answer Click Save and Submit to save and submit. Click Save All Answers to save all answers Save All Answers...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a)...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a) Make a plot of absorbance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the absorbance on the yaxis and concentration on the cas. b) Make a plot of % transmittance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the transmittance on...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2 -505 nm. Concentration of [Fe(Phen)/, M Absorbance 9.500 x 10 0.999 4.250 x 10 0.480 0.219 2.125 10% 1.063 x 10 0.104 0.000 0.003 Table 2. UV-vis absorbance values of [Fe(phen)]* held at 35 °C after mixing with H SO, and recorded at 5 minute intervals (in water at max = 505 nm). Time (minutes) Absorbance 0.997 0.935 0.877 0.823 0.772 0.724 0.680 0.638...
please help with parts a. and #3 Concentration of blue dye Absorbance a. Calculate the slope and y-intercept for...
please help with parts a. and #3
Concentration of blue dye Absorbance a. Calculate the slope and y-intercept for the line of best fit. Show your work and include units. (1.6810 0.201) (4.0x10L, 6.510) 8.0 x 10 0.100 1.6 x 100 .201 1.3 x 165, 2.4 x 10 0.302 3.2 x 10 0.403 0.510 moY₂-Y, (0.510-0.201) 0.309 Xxx (4.0x104-1.6x10on) - 24010" Ymyib b: 0.2-01 -(1.3 x U'M (1.6 X 10M buy-m+ b 0.201- 0.204 slope: 1.3x105 m y-intercept: -0.007 4.0...
5
A calibration curve used in UV/VIS spectroscopy plots concentration on the y-axis and absorbance on the x-axis. O A) True OB) False Question 5 (2 points) A working standard is prepared by taking 38.00 mL of a 500.0 ppm stock solution and diluting it tos a final volume of 650.0 mL. Calculate the ppm concentration of the working solution. Provide your answer to two places after the decimal and without units. Your Answer: Answer Submit Out 2afactione ad
Need a graph with the absorbance and the concentration plotted with
the x and y axis the unknown is .508 absorbance and the the unknown
concentration is 24.19 . With these values beers gas laws
15 EXPERIMENT 45 Report Sheet 1. Unknown number 2. Data table Tube # | Dye olume (mL) | DyeconcentrationhW | Ahorhance (520mm, 0 c00 20 32698 | 85-1 | :779 :132 46.8 3. Unknown absorbance value 4 Uniknown concentration from the graph
3. A student repeated the experiment with a different compound, Biomarker X. The equation for the line of best fit from their calibration curve was y = 3.612x104 X+0.0060. If the original concentration of the student's unknown sample of Biomarker X was 8.25x104 M, what is the expected percent transmittance of the diluted unknown sample? Percent Transmittance: Show Your Calculations Below: A. Concentration of Biomarker by Spectrophotometry: Concentration of Stock Biomarker Solution (M): 1.1754 10M **Note: Measure the Percent Transmittance...
Laboratory Questions: Spectrophotometry and Beer's Law 1. In preparing a calibration curve for a certain colored species, a student obtained the following data: Concentration Percent Transmittance Absorbance 1.00 x 10M 87.1% 2.00 x 10-M 79.4% 4.00 x 10M 60.3% 6.00 x 10-'M 43.7% 1.00 x 10-2M 26.3% a. Complete the table above by finding the absorbance for each solution. b. Plot the data on the attached piece of graph paper. Plot A vs. conc. c. Determine the absorbance and the...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
1 points Save Answer QUESTION 25 A student finds the percent transmittance and the absorbance of a 0.10 M solution at different wavelengths, and the two graphs are presented below. 0 560 60 W ength 400 440 480 5.0 Wavelength (m) What is the optimum wavelength for the analysis? a. 510 nm 0 0 | 튼튼 0 1 points Save Answer Click Save and Submit to save and submit. Click Save All Answers to save all answers Save All Answers...
Determination of Phosphate in Water Out-of-Class Exercise 4. Use Data Set I t o answer the following questions a) Make a plot of absorbance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the absorbance on the yaxis and concentration on the cas. b) Make a plot of % transmittance versus concentration for the data set. Draw the best straight line or smooth curve (whichever is appropriate). Put the transmittance on...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2 -505 nm. Concentration of [Fe(Phen)/, M Absorbance 9.500 x 10 0.999 4.250 x 10 0.480 0.219 2.125 10% 1.063 x 10 0.104 0.000 0.003 Table 2. UV-vis absorbance values of [Fe(phen)]* held at 35 °C after mixing with H SO, and recorded at 5 minute intervals (in water at max = 505 nm). Time (minutes) Absorbance 0.997 0.935 0.877 0.823 0.772 0.724 0.680 0.638...
please help with parts a. and #3
Concentration of blue dye Absorbance a. Calculate the slope and y-intercept for the line of best fit. Show your work and include units. (1.6810 0.201) (4.0x10L, 6.510) 8.0 x 10 0.100 1.6 x 100 .201 1.3 x 165, 2.4 x 10 0.302 3.2 x 10 0.403 0.510 moY₂-Y, (0.510-0.201) 0.309 Xxx (4.0x104-1.6x10on) - 24010" Ymyib b: 0.2-01 -(1.3 x U'M (1.6 X 10M buy-m+ b 0.201- 0.204 slope: 1.3x105 m y-intercept: -0.007 4.0...
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