Question: Please help me with this chemistry problem! Note: Please show all your work! 1. Consider the following instrument configuration: A multiwavelength, collimated Light Emitting Diode

Please help me with this chemistry problem!

Note: Please show all your work!

Please help me with this chemistry problem! Note: Please show all your

work! 1. Consider the following instrument configuration: A multiwavelength, collimated Light Emitting

1. Consider the following instrument configuration: A multiwavelength, collimated Light Emitting Diode (LED) with primary emission at 500nm(50W),545nm(25W) and 600nm(100W) is used as a light source. The LED is focused onto bandpass filter with the transmission spectrum shown in Figure 2. The transmitted light is then directed via a series of mirrors onto a standard 1cm cuvette similar to the configuration shown in Figure 1. Relevant pieces of info are given below. a. You must choose the material from which to construct the sample cell. If the sample cell is a 1cm square cuvette with 0.5mm thick walls, which material would be a better choice for construction of the sample cell from 5 types of Schott glasses listed in the table below? Justify your answer b. What is the intensity at point C if two Ag mirrors are used (see reflectance curve below)? Note: values for normal incidence and 45 incidence are the same for this mirror c. For an absorbance measurement, at what point (a through d) should I0 be measured? Why? d. If the sample cell contains a non-absorbing species, what is the intensity of light measured at point D if a 1.0cmF2 sample cell and Ag mirrors are used in the system? e. If the F2 sample cell contains a solution of molecule X at a concentration of 10.0M(=50,000 M1cm1 ) what is the intensity of light measured at point D ? Figure 1 -Instrument schematic Figure 2. Transmission spectrum of bandpass filter. Refractive Index of Five Schott Glass Types reflectance curve for Ag mirror

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