1. Elimination
reactions

2. Elimination reaction
 Dehydration
of an alcohol is an example of
an elimination reaction
 In this reaction, a larger alcohol molecule
reacts to form a smaller alkene molecule and
an even smaller water molecule
 The change in structure is from tetrahedral to
planar

3. Dehydration of ethanol
 Ethanol
 This
is dehydrated to ethene
reaction is used in the preparation of
ethene

4. Dehydration of ethanol to ethene

5. Reaction conditions
 Heat
 Aluminium
oxide catalyst

6. Preparation of ethene

7. Preparation of ethene