AQA GCSE Chemistry Alkenes
This page covers the following topics:
1. Formulae and solubility of alkenes
2. First four alkenes
3. Molecular formula of alkenes
4. Nomenclature of alkenes
Alkenes are unsaturated hydrocarbons, meaning that there is a C=C bond present. They, like alkanes, are non polar molecules so are relatively insoluble in water.
The first 4 alkenes are slightly different to the first 4 alkanes as there MUST be a C=C bond.
Molecular formula shows the number and type of atoms present in a molecule, remember that for alkenes they will follow the general formula from before.
Naming alkenes follows the same structure as naming alkanes, however you must also indicate where the C=C bond(s) are in the molecule.
What is the molecular formula of ethene?
What is the name of the 4th alkene?
How many structural isomers are there for butene? Draw structural formulas for these compounds.
Name the molecule shown
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