ย 

Alkanes for AQA GCSE Chemistry

Alkanes

This page covers the following topics:

1. Formulae and solubility of alkanes
2. First four alkanes
3. Molecular formula of alkanes

Alkanes are saturated hydrocarbons, they are non-polar so are insoluble in water.

Formulae and solubility of alkanes

The first 4 alkanes follow the usual naming pattern for hydrocarbons.

First four alkanes

Molecular formula shows the number and type of atoms present in a molecule, remember that for alkanes they will follow the general formula from before.

Molecular formula of alkanes

1

How does solubility of alkanes change with chain length?

Shorter alkanes are slightly more soluble than longer chain alkanes.

How does solubility of alkanes change with chain length?

2

What is the name of the molecule Cโ‚‚Hโ‚†?

ethane

What is the name of the molecule Cโ‚‚Hโ‚†?

3

What is the general formula of alkanes?

CnH2n+2

What is the general formula of alkanes?

4

What is the molecular formula of ethane?

Cโ‚‚Hโ‚†

What is the molecular formula of ethane?

5

What is the molecular formula for an alkane with 20 carbon atoms?

Cโ‚‚โ‚€Hโ‚„โ‚‚

What is the molecular formula for an alkane with 20 carbon atoms?

End of page

ย