PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 17, Problem 17.5QAP
Interpretation Introduction
Interpretation:
The compound that contains nitrogen and boils at
Concept introduction:
The mid-absorption region of the IR spectroscopy is called a functional group region. The functional group region also provides important information about the presence of
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Which of the following statements concerning spectroscopy is correct?
A) Concentration of a solution is directly proportional to the % of photons transmitted.
B) Salt plates are often used in IR spectroscopic measurements because they are transparent in that
region.
C) Molar absorptivity is a constant for given species, regardless of concentration or wavelength.
D) Fluorescence excitation is usually red-shifted from emission wavelength.
E) 2 or more statements are correct.
The absorbed energy to enable vibrational level transition falls within which wavelength range
A) radio wave
B) microwave
C) IR
D) X-ray
E) UV and visible
2. What are the classes of absorption spectroscopy?
What are the types of atomization in atomic absorption spectroscopy?
Chapter 17 Solutions
PRINCIPLES OF INSTRUMENTAL ANALYSIS
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- The two spectra below correspond to 2-butanol (CH3CH2CH(OH)CH3) its isomer, 2-methyl-1-propanol ((CH3)2CHCH2OH). Draw these two isomers, and assign the correct spectrum to each isomer. Explain what spectral data you used to reach your conclusion.arrow_forward1. TRUE OR FALSE a) Organic compounds are normally analyzed in atomic spectroscopy despite their small electronic transition range. b) Atomic spectroscopy can detect both absorption and emission radiation as electrons move from HOMO to LUMO.arrow_forwardWhich of the following statements regarding IR spectroscopy is incorrect?arrow_forward
- Which of the following describes visible light spectroscopy? Group of answer choices A method of measuring the amount of energy 400 nm - 700 nm due to absorption by electrons in the sample. A method of measuring the amount of energy 400 nm - 700 nm due to emission by electrons in the sample. A method of measuring the amount of energy 0.8 ?μm - 2.5 ?μm due to absorption by electrons in the sample. A method of measuring the amount of energy 0.8 ?μm - 2.5 ?μm due to emission by electrons in the sample. A method of measuring the amount of energy 100 nm - 400 nm due to absorption by electrons in the sample. A method of measuring the amount of energy 100 nm - 400 nm due to emission by electrons in the sample.arrow_forwardWhich of the following has the higher energy: (a) light having a ν of 104 Hz or 108 Hz; (b) light having a λ of 10 nm or 1000 nm; (c) red light or blue light?arrow_forwardHere is an energy level diagram that illustrates the absorption process. Energy ES (n=5) E4 (n=4) E3 (n=3) E2 (n=2) E1 (n=1)arrow_forward
- Explain the principal work of atomic absorption spectroscopy? And how is it used for the determination of unknown heavy metals and other metals concentrations?arrow_forward: If a test substance gives a really high level of “absorbance” of green light, will the reading of the green light “transmittance” be “the same”, “really high also,” or “really low?” Please explain your answerarrow_forward5) Given the absorbance spectrum shown below, what wavelength of light would you use for nickel(II) ion? Explain your answer. Absorbance 0.8 0.6 0.4 1 0.2 0 350 400 Absorbance vs. Wavelength for Nickel(II) ion 450 500 550 600 650 Wavelength (nm) 700 750 800 850arrow_forward
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