Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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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
Complete the TABLE
What are the types of atomization in atomic absorption spectroscopy?
Chapter 17 Solutions
Principles of Instrumental Analysis
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Similar questions
- 1. 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_forward2. What are the classes of absorption spectroscopy?arrow_forwardBelow an energy dispersive spectroscopy (EDS) graph of a sample that has been coated with carbon for electron collection is given. Determine what elements this sample definitely consists of. Explain your reasoning. Which of the elements present in this sample can cause fluorescence in Fe (26) if it was present here?arrow_forward
- 5) 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_forwardplace the following nuclei in descending order of reference frequency for the same instrument. P31, N14, N15, F19, H1, Si29, H2, C13arrow_forwardPlease explain.arrow_forward
- I need help with 4 ( not a graded question, its for a lab homework)arrow_forwardGive typed full explanation not a single word hand written otherwise leave it Which of the following statements are 'correct' regarding the fluorescence and phosphorescence emission processes commonly used in spectroscopy? I- Fluorescence and phosphorescence events are important emission processes that occur after the excitation of atoms or molecules with a thermal or chemical energy. II. In the photoluminescence processes called fluorescence and phosphorescence, a ray-excited species returns to its ground state by releasing its extra energy in the form of photons. III-If gaseous atoms are excited with any energy, the atom emits a beam with the wavelength that characterizes it, and makes fluorescent radiation. IV. It is possible for a light-excited atom or molecule to return to a lower energy level or ground state by heat transfer by collisions without emitting any rays. A. IandIII B. IandII C. II and IV D. Il and IIIarrow_forwardAnswer all of the following about colours and UV-Visible Spectra. a) The very idealized UV-Visible Spectrum of a violet solution of [Sc(H2O)6]** is shown: 3. wavelength A chemist carries out the following reaction: [Sc(H2O)s]* + Z yellow solution [ScZe]* (n depends on Z) Is Za solution of NH3 or a solution of NaBr? Justify your answer. Predict the shift (if any) in the UV-Visible Spectrum for [ScZ6]". Justify your answer. b) The following hydroxide species are all known: Mn(OH)42 Co(OH)4 Zn(OH). • Assign a colour to each species. Possible choices: blue, red, colourless Note: some choices may be used more than once, some not at all. Justify your answer for any one of the species.arrow_forward
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