515nm - 0.59 absorbance 610nm- 0.05 absorbance 475nm - 0.40 absorbance Of the three wavelengths measured...
515nm - 0.59 absorbance 610nm- 0.05 absorbance 475nm - 0.40 absorbance Of the three wavelengths measured in Part I, which gives the maximum absorbance? Does it make sense? Why or why not?
Homework Answers
Wavelength of 515nm gives the maximum absorbance of 0.59.
And yes it makes sense
The maximum absorbance can be observed on this wavelength, it is not necessary that larger wavelength has larger absorbance so this makes sense.
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515nm - 0.59 absorbance 610nm- 0.05 absorbance 475nm - 0.40
absorbance Of the three wavelengths measured...
Why is it appropriate to connect the data points for graph 1 (absorbance vs wavelength) but...
Why is it appropriate to connect the data points for graph 1
(absorbance vs wavelength) but not appropriate for graph 2
(absorbance vs concentration)? What type of information does each
graph convey?
Absorbance vs Wavelength 0.55 0.50 0.45 0.40 0.15 0.30 Absorbance 0.25 0.20 0.15 0.10 . 0.00 380 400 4200 460 480 500 520 540 560 580 600 620 640 660 680 700 720 700 750 780 Wavelength Absorbance vs Concentration 0.45 y = 0.002 x 0.002 R=0.9997 0.40...
Part C The absorbance of a cationieron) sample solution was measured in a spectrophotometer, but the...
Part C The absorbance of a cationieron) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 L of the sample and injecting it into a cuvette already containing 2.00 mL of water total volume is 200 ml + 100.0 L). The absorbance value of the diluted solution corresponded to a concentration of 7.84x10-6 M. What was the concentration...
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but...
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 μL). The absorbance value of the diluted solution corresponded to a concentration of 6.70×10−6 M . What was...
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted...
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 μL). The absorbance value of the diluted solution corresponded to a concentration of 6.70×10−6 M . What was...
1. (2points)The spectrophotometric absorbance of three different solutions could be measured in this experiment to determine...
1. (2points)The spectrophotometric absorbance of three different solutions could be measured in this experiment to determine the concentration ratio of unbound ferrihemoglobin (Hb.Fe3+) to boundferrihemoglobin-imidazole(Hb.Fe3+.Im. These solutions, designated A, A0, and A100 are important. Use these terms to mathematically define: a) [ Hb.Fe3+] and b) [Hb.Fe3+.Im]
. What wavelengths of light (UV, specific colors, infrared, X-ray, etc.) do you expect plants to...
. What wavelengths of light (UV, specific colors, infrared, X-ray, etc.) do you expect plants to use for photosynthesis? Which ones would make the most sense and why?
Based on table 1, why Lmax shifts towards higher wavelengths when you go from ethylene to...
Based on table 1,
why Lmax shifts towards higher wavelengths when you go from
ethylene to b-carotene?
Figure 1. violet blue green yellow orange red purple 500 800 nm The greater the degree of conjugation of chromophores the greater the chance that the absorption of light will occur at higher wavelengths. Table 1 illustrates the effect of conjugation (where max gives the wavelength of maximum absorption): # of conjugated double bonds 175 Table 1. Compound Ethylene 1,3-Butadiene 1.3.5-Hexatricne B-Carotene 258...
Name: Prelab 1. Find the wavelengths for the different colors of light that make up the...
Name: Prelab 1. Find the wavelengths for the different colors of light that make up the visible (white) light spectrum. You can use your textbook or the internet to find this information. Note which source you used in completing this table. Color Wavelength Range Violet Blue Green Yellow Orange Red 2. Knowing that the FeSCNP complex is red, predict the color of light it absorbs, and determine the range of wavelengths in which you would expect to find its wavelength...
When using a spectrometer to measure the absorbance as a function of concentration, why do we...
When using a spectrometer to measure the absorbance as a function of concentration, why do we have to plot our calibration curve at the maximum wavelength (lambda max)? I know it's to get the highest point of absorbance and therefore ensure high sensitivity, but how does it affect my answers on the calibration curve? what if I didn't use lambda max?
5. The following data were obtained when Bio 106 students created solutions of the following concentrations...
5. The following data were obtained when Bio 106 students created solutions of the following concentrations (column 1), These students then placed three different samples of each concentration in a spectrophotometer and measured the absorbance. The following data table was created by these students. Create a standard curve from the data in the following table. Be sure to calculate the average absorbance for each concentration (round to two decimal places). After you have created the table, answer the following questions....
Why is it appropriate to connect the data points for graph 1
(absorbance vs wavelength) but not appropriate for graph 2
(absorbance vs concentration)? What type of information does each
graph convey?
Absorbance vs Wavelength 0.55 0.50 0.45 0.40 0.15 0.30 Absorbance 0.25 0.20 0.15 0.10 . 0.00 380 400 4200 460 480 500 520 540 560 580 600 620 640 660 680 700 720 700 750 780 Wavelength Absorbance vs Concentration 0.45 y = 0.002 x 0.002 R=0.9997 0.40...
Part C The absorbance of a cationieron) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 L of the sample and injecting it into a cuvette already containing 2.00 mL of water total volume is 200 ml + 100.0 L). The absorbance value of the diluted solution corresponded to a concentration of 7.84x10-6 M. What was the concentration...
Based on table 1,
why Lmax shifts towards higher wavelengths when you go from
ethylene to b-carotene?
Figure 1. violet blue green yellow orange red purple 500 800 nm The greater the degree of conjugation of chromophores the greater the chance that the absorption of light will occur at higher wavelengths. Table 1 illustrates the effect of conjugation (where max gives the wavelength of maximum absorption): # of conjugated double bonds 175 Table 1. Compound Ethylene 1,3-Butadiene 1.3.5-Hexatricne B-Carotene 258...
Name: Prelab 1. Find the wavelengths for the different colors of light that make up the visible (white) light spectrum. You can use your textbook or the internet to find this information. Note which source you used in completing this table. Color Wavelength Range Violet Blue Green Yellow Orange Red 2. Knowing that the FeSCNP complex is red, predict the color of light it absorbs, and determine the range of wavelengths in which you would expect to find its wavelength...
5. The following data were obtained when Bio 106 students created solutions of the following concentrations (column 1), These students then placed three different samples of each concentration in a spectrophotometer and measured the absorbance. The following data table was created by these students. Create a standard curve from the data in the following table. Be sure to calculate the average absorbance for each concentration (round to two decimal places). After you have created the table, answer the following questions....
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