2.2.3 Modern analytical techniques

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What happens when molecules absorb infrared radiation?
specific frequencies cause covalent bonds to vibrate
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How are compounds identified using infrared spectroscopy?
computer will compare IR spectra against a database of known pure compounds
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How can you identify an alcohol from IR?
peak of O-H bond
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How can you identify an aldehyde or ketone from IR?
peak of C=O bond
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How can you identify a carboxylic acid from IR?
peak of O=C and very broad O-H
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How do modern breathalysers work?
measure ethanol in breath using IR spec
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what are the uses of mass spectrometry?
determination of relative isotropic masses // identify elements (space probes and monitoring environmental pollution)
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Card 2

Front

How are compounds identified using infrared spectroscopy?

Back

computer will compare IR spectra against a database of known pure compounds

Card 3

Front

How can you identify an alcohol from IR?

Back

Preview of the front of card 3

Card 4

Front

How can you identify an aldehyde or ketone from IR?

Back

Preview of the front of card 4

Card 5

Front

How can you identify a carboxylic acid from IR?

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