Write the reaction equations: a) Ethane-Ethylene-Ethyl alcohol-Bromoethane b) Ethanol-Ethylene-Ethane-Bromoethane

a) (1) dehydrogenation reaction:
CH3-CH3 —–> CH2 = CH2 + H2.
(2) hydration in the presence of H2SO4:
CH2 = CH2 + H2O —–> CH3-CH2-OH.
(3) reaction with hydrogen bromide in the presence of H2SO4:
CH3-CH2-OH + HBr —–> CH3-CH2-Br + H2O.
b) (1) dehydration, t = 140 ° C, H2SO4:
CH3-CH2-OH —–> CH2 = CH2 + H2O.
(2) hydrogenation:
CH2 = CH2 + H2 —–> CH3-CH3.
(3) bromination:
CH3-CH3 + Br2 —–> CH3-CH2-Br + HBr.



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