Question

Preparation ethyl bromide from ethene

Answer 1

The simplest method of converting ethyl bromide to ethene is through dehydrohalogenation.

Explanation:
Dehydrohalogenation refers to the removal of hydrogen and halogen from a compound. Usually, we remove the hydrogen from one carbon atom and then, the halogen from the adjacent carbon atom.

The reagent used is alcoholic KOH (potassium hydroxide) which favors elimination (in this case, the elimination of hydrogen and halogen in the form of hydrogen halide).

Here you go!

http://chem-guide.blogspot.ro/2010/04/general-methods-of-preparation-of_04.html

Answer 2

C2H5Br + KOH +heat gives c4H9+kBr + H2O