Tuesday 21 June 2011

Unit 3.8 Describe the addition reaction of alkenes with bromine, including decolourising

1. Write the word equation showing the reaction between Ethene and bromine water:
Ethene (g) + Bromine Water (aq) --> Dibromoethane
2. Draw the displayed formula of the reaction above: 














3. Explain the observations:
The reaction turns the water from red-brown to colourless
4.Why does this reaction not need a catalyst?
Because the unsaturated carbon carbon double bond is so reactive it facilitates the reaction on its own
5. What type of reaction is this called?
An addition reaction
6.Explain why this reaction is useful:
Because it can be used as a chemical test for Alkenes and the presence of the carbon carbon double bond