We write down the reaction equation for obtaining bromoethane from acetylene. We get the following.
1) CH triple bond CH + 2HBr = CH2Br – CH2Br.
In order to obtain bromoethane from acetylene, add 2 molecules of hydrogen bromide. Addition reaction. As a result, 1.2 – good ethane is formed.
2) CH triple bond CH + H2 = CH2 = CH2.
First, we get ethene from acetylene using a hydrogenation reaction, by adding hydrogen.
CH2 = CH2 + HBr = CH2Br – CH3.
Then we add hydrogen bromide, as a result, hydrogen bromide is formed.
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