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...
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(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...
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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...
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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
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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...
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