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Unformatted text preview: evolved in F during the later stages of the reaction, disconnect the delivery-tube joining F to B, and then turn out the gas. Carry out the following tests with the jars of ethylene. (1) Odour. Smell the contents of one of the jars. The ethylene has a characteristic sweetish odour. Ethylene when deeply inhaled produces temporary anaesthesia which is almost devoid of unpleasant after-effects; hence it has been used for dental surgery, minor operations, etc. (2) Bromine. Slip slightly to one side the glass plate covering one jar of ethylene, add 2-3 ml. of bromine water (preparation, p. 525), restore the glass plate in position, and then shake the jar vigorously. The colour of the bromine rapidly disappears as i,2-dibromoethane is formed. Note that owing to the absorption C 2 H 4 + Br 2 = C 2 H 4 Br 2 of ethylene, a partial vacuum now exists in the jar....
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.
- Fall '06
- Organic chemistry