Comparing the rates of hydrolysis of chloro-, bromo- and iodo- alkane

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Experiment2

Aim

  1. To compare the rates of hydrolysis of chloro-, bromo- and iodo- alkane.
  2. To compare the rate of hydrolysis of aliphatic and aromatic halogeno-compounds.
  3. To compare the rate of reaction of halogen ions under sunlight and when ammonium hydroxide is added.

Procedure

A:

  1. 2cm3 of ethanol were added to three separate test tubes and were placed them in a beaker of water kept at about 60℃.
  2. 1 cm3 of 0.1M silver nitrate(V)solution was added to each test tubes.
  3. Using separate teat pipettes, 5 drops of 1-chlorobutane was added to the first test tube, 5 drops of 1-bromobutane was added to the second and 5 drops of 1-iodobutane was added to the third.
  4. The test tubes were shaked and the order in which the precipitates appeared was observed. The precipitate formed in each case was noted.
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B:

  1. 2cm3 of ethanol were added to two separate test tubes and were placed them in a beaker of water kept at about 60℃.
  2. 1 cm3 of 0.1M silver nitrate(V)solution was added to each test tubes.
  3. Using separate teat pipettes, 5 drops of 1-bromobutane was added to the first test tube, 5 drops of bromobenzene was added to the second.
  4. The test tubes were shaked and the order in which the precipitates appeared was observed. The precipitate formed in each case was noted.
  5. Step1~4 was repeated while the test tubes were kept in room temperature.
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