3.8 I can describe the reaction between alkenes and bromine

1.       Write the word equation showing the reaction between ethene and bromine water

Ethene + Bromine (l) --> bromoethane + hydrogenbromide 

                                         or dibromoethane 

2.       Draw the displayed formula of the reaction above

3.       Explain the observations

The liquid turns from brown/ yellow to colourless because the bromine molecules are separated and loses it's colour

4.       Why does this reaction not need a catalyst?

 A catalyst is not needed because alkenes and the carbon carbon double bond is very reactive.

5.       What type of reaction is this called?

This is called an addition reaction

6.       Explain why this reaction is useful

 Because it shows when a non saturated bond is present