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Establishment of first workingmen's party
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- 1-bromobutane can be prepared from butan-1-ol and hydrogen bromide. CH3CH2CH2CH2OH + HBr → CH3CH2CH2CH2Br + H2OHydrogen bromide can be made from sodium bromide and 50% concentrated sulfuric acid. (a) The steps for the preparation of impure 1-bromobutane are summarised.1. Dissolve sodium bromide in distilled water in a pear-shaped flask then add 20.0 cm3 of butan-1-ol.2. Surround flask with an ice bath to COOL MIXTURE, before adding concentrated sulfuric acid drop by drop.3. Remove flask from ice bath + add a few ANTI-BUMPING GRANULES to the reaction mixture.4. Set up apparatus for HEATING UNDER REFLUX. Heat mixture in flask for 30 minutes + leave apparatus to cool.5. Rearrange apparatus for distillation + heat mixture until no more 1-bromobutane distils over.(i) Parts of the method are given in BOLD type in Steps 2, 3 and 4. Give a reason why each of these parts is necessary. (3)