Answered: %Transmittance CS Scanned with…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter29: Mass Spectrometry

Section: Chapter Questions

Problem 29.5QAP

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Transmittance (%) 100% 75% 50% 25% 0% 4000 3500 3000 OH 2500 2000 Spectrum 3B 1750 حسيمة 1500 Wavenumber (cm-¹) 1250 .OH 1000 OH 750 500
QUESTION 5 The IR, 'H NMR and 1°C NMR spectra of compound P are shown below. The molecular formula for compound P is CsH;NO2. Identify three (3) important absorption peaks on the IR spectrum and indicate the bond and wavenumber associated with each peak. Elucidate the structure of compound P and assign each peak in the 'H and 13C NMR spectra. (Hint: The compound consists of more than one functional group). а. b.
Transmittance (%) Transmittance (%) 100 50 4000 100 4000 3000 2000 1500 Wavenumber(cm¹) 1500 Wavenumber(cm¹) 1000 1000 500
Suppose a student is preparing a set of standard solutions for use in a spectrophotometric study. If percent transmittance, %T, were measured in the standard solutions before the color had a chance to fully develop, the measured value would be compared with solutions that have allowed the color to fully develop.
13 C,H120 MICRONS 9 10 13 14 15 16 100 70 60 20 1000 800 600 400 1400 WAVENUMBERSS (CM) 4000 3600 3200 2800 2400 2000 1800 1600 1200 10 % TRANSMITTANCE
6. C8H100 11 TRANSMITTANCE LOD HSP-04-492 0+ 10 4000 9 3000 8 5 7 6 : 5 ppm 2000 4 HAVENUMBERI-l 2: 2 1 3 1500 2 سهر 1 1000 0 500 200 T 180 CDS-06-431 DEPT-90 T 160 DEPT-135 140 120 100 لك -2 peaks u ppm 80 60 40 20 0
100 - 80 60 40 20 10 15 20 25 30 35 40 45 50 55 60 m/z Absorbance / % 50- 100+ 4000 3000 2500 2000 1500 1000 500 Wavenumbers / cm Relative Intensity / %
What percent transmittance range and what absorbance range are considered to be the optimum working ranges for spectrochemical measurements?
What absorbance corresponds to 1% transmittance? To 50% transmittance?
0.8 0.6 0.4 0.2 0.0 3000 2000 1000 Wavenumber (cm-1) ОН NH2 `NH2 A В C Transmitance
3. In molecular absorption spectrophotometry, the relationship between transmittance and concentration is not linear while the absorbance vs concentration is linear. True False
1. In UV-Vis spectrophotometric analysis, the 2.82% transmittance of solution has an absorbance value of 1.55. * True False

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%Transmittance CS Scanned with CamScanner 2222222222222225¦ 5 0 4000 3500 3000 8 2500 2000 1500 1000 500 Wavenumbers (cm-1)