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Predict the Integration and Approximate Chemical Shifts

A) NMR Spectroscopy
B) Mass Spectrometry
C) Infrared Spectroscopy
D) Gas Chromatography

User ShivanKaul
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Final answer:

Predicting integration and chemical shifts involves using NMR Spectroscopy to study isotopes of carbon and chemicals with C-H bonds, IR Spectroscopy to identify the presence of hydrogen bonds, and Gas Chromatography in concert with Mass Spectrometry for substance identification.

Step-by-step explanation:

The student's question pertains to predicting integration and chemical shifts in various analytical chemistry techniques such as Nuclear Magnetic Resonance (NMR) Spectroscopy, Mass Spectrometry, Infrared (IR) Spectroscopy, and Gas Chromatography. NMR Spectroscopy involves the use of isotopes of carbon, searching for chemicals with carbon to hydrogen bonds, and can give information about the environment around the protons in a molecule (chemical shift > 5 ppm), as well as the integration of these protons to determine molecular structures. IR Spectroscopy is used to look for the presence of hydrogen bonds among other functional groups by identifying specific absorbance bands corresponding to molecular vibrations, providing signals at specific frequencies. Finally, Gas Chromatography can be used in conjunction with mass spectrometry to separate and identify unknown substances through their physical and chemical properties.

For instance, students could be asked to use an online spectral database to find the IR spectra of compounds such as 1-methylcyclohexanol and others, identifying exact absorbance bands and the corresponding frequencies. Moreover, students might be tasked to explain the relationship between bond strength and absorbance frequency, referring to the analogy of bonds acting like springs.

User Hosar
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