Chemical tests involving alkanes, alkenes and alcohols
I can use data to identify the functional group and predict the chain length for an alkane, alkene or alcohol.
Chemical tests involving alkanes, alkenes and alcohols
I can use data to identify the functional group and predict the chain length for an alkane, alkene or alcohol.
Lesson details
Key learning points
- A chemical test can identify the differences between alkanes and alkenes.
- Data from calorimetry and viscosity experiments can be used to predict the chain length of alkanes, alkenes & alcohols.
- As chain length increases, more energy is released during combustion.
- As chain length increases, the viscosity of alkanes, alkenes and alcohols increases.
Common misconception
Describing the colour change of bromine water with an alkene from orange to clear.
Coloured solutions can be clear if you can see through them. Colourless means it has no colour. Bromine water in the presence of an alkene changes from orange to colourless.
Keywords
Homologous series - A homologous series of organic compounds have the same general formula, and show similar chemical properties and physical property trends.
Functional group - The functional group is the atom or group of atoms responsible for the way a compound reacts.
Calorimetry - Calorimetry is an experiment that can be used to measure the energy released from a fuel.
Viscosity - Viscosity is how easily a liquid flows. The higher the viscosity, the less easily a liquid flows.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
alkene -
C=C
alcohol -
–OH
carboxylic acid -
–COOH
ester -
–COO–
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Exit quiz
6 Questions
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