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Edexcel GCSE Chemistry Cycloalkanes

Cycloalkanes

This page covers the following topics:

1. Formulae and solubility
2. First five
3. Molecular formula

Cycloalkanes are hydrocarbons that consist of a ring of carbons with single carbon-carbon bonds. As they contain only carbon and hydrogen they are also not very soluble in water. They generally have slightly higher boiling points than alkanes.

Formulae and solubility

The first 4 clycloalkanes have a different number of carbons to the first 4 alkanes as there MUST be a carbon ring. The minimum number of carbons needed to complete a ring is 3.

First five

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.

Molecular formula

1

What is the general formula of cycloalkanes?

What is the general formula of cycloalkanes?

2

What is the name of the cycloalkane with the shortest possible carbon chain (the first cycloalkane)?

What is the name of the cycloalkane with the shortest possible carbon chain (the first cycloalkane)?

3

What is the molecular formula of cyclohexane?

What is the molecular formula of cyclohexane?

4

The boiling point point of pentane is 36Β°C, estimate what the boiling point of cyclopentane is.

The boiling point point of pentane is 36Β°C, estimate what the boiling point of cyclopentane is.

5

How does solubility of cycloalkanes change with chain length?

How does solubility of cycloalkanes change with chain length?

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