* TRANSMITTANCE 5H Proton NMA 160 140 CO 8200 2963.84 6 120 HAVENUMBERS 5 100 Im 80 1883.05- 60 452.6893:69 377.35 1H 40 -8 2 3H 2H 869 MF C10H14 MW 134 %C 89.5 %H 10.5 3H ™ 1 PPM 20 PPM 0
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Provide the structure (draw) for the IR and NMR spectra provided.
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- 7. Explain what is meant by signal in instrumental analysis.1. A solution that absorbs radiation with a λmax at 475nm is placed within a UV visible spectrophotometer. An absorbance of 0.82 is recorded. Calculate the percentage of the incident light that is being absorbed.If two signals differ by 1.5 ppm in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?
- You measure that the %T of a sample at 850 nm is 20%. What is the absorbance of this sample? Report your answer to three decimal places.Complete the information on these tables: wavelength 470 nm conc Um absorbance % transmission 700 0.45 35.58% 500 0.32 47.78% 300 0.19 64.2% 100 0.06 86.23% wavelength 502 nm conc Um absorbance % transmission 700 1.08 8.37% 500 0.77 16.99% 300 0.46 34.57% 100 0.15 70.15% Which mathematical relationship is most useful to relate concentration to the amount of light passing through the solution? (% Transmission, or Absorbance), Why? How does the slope of the absorbance/concentration graph vary with wavelength? Is there an “optimum” wavelength for your KMnO4 sample?1. What is the concentration of the dye in a solution with a percent transmittance reading of 61.6% at 570 nm? 1a. If the solution in Part 1 was made by taking 10.00 mL of a stock solution and diluting it to 100.00 mL, what is the concentration of the dye in the stock solution?
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