Unformatted text preview: Share results. • Part 3 (done in pairs) – Melting point of urea – cinnamic acid mixtures. One partner takes a melting point of a 1:4 mixture of urea and cinnamic acid, and the other, a 4:1 mixture. Share results. • Part 4 (done individually) – Each student takes a melting point of an unknown compound and determines its identity from the list of possible compounds on p. 54. Questions 1. Williamson, p. 59-60 - #2, 3, 4, 5, 6, 7, 9, 11, 12, 2. Answer True or False : • A pure compound has a sharp melting point. • The melting point of an impure compound is depressed and broadened, compared to a pure compound. • A charcoal contaminant depresses a compound’s melting point. Smith 1/03...
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- Fall '08
- Organic chemistry, Chemical substance, Chemical compound, cinnamic acid