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About CCA!
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| Oxidation of Alcohols with Chromic Acid |
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Voiceover
These four Petri dishes contain acidic dichromate solution. Ethanol, a primary alcohol, is added to the first dish. 2-Propanol, a secondary alcohol, is added to the second dish. 2-Methyl-2-propanol, a tertiary alcohol, is added to the third dish. The fourth is left as a control. After 20 seconds, the ethanol solution becomes green then blue. The 2-propanol produces the same sequence of color changes but at a slower rate. Primary and secondary alcohols are oxidized by dichromate; whereas tertiary alcohols do not react. The yellow chromium(VI) ion is reduced to blue chromium(III).
Discussion
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Citation:
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Kolb, K. E.
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J. Chem. Educ. 1986, 63, p 977.
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Design, Text and Demonstrator:
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Gary Trammell
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University of Illinois at Springfield, Springfield, IL 62794
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Videographer/Editor:
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Steve Dykema
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University of Illinois at Springfield, Springfield, IL 62794
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Voice:
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Margaret Biddle
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University of Wisconsin - Madison, Madison, WI 53706
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Audio Production:
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Greg Minix
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University of Wisconsin - Madison, College of Engineering, Madison, WI 53706
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Jerrold J. Jacobsen
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University of Wisconsin - Madison, Madison, WI 53706
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