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The viscosity of alcohols depends on a number of factors: - the strength of intermolecular forces - the size of the molecule - temperature These factors can be investigated using alcohols and apparatus from the lists below - Scottish Highers Chemistry - Question 4 - 2016
Question 4
The viscosity of alcohols depends on a number of factors: - the strength of intermolecular forces - the size of the molecule - temperature These factors can be inv... show full transcript
Worked Solution & Example Answer:The viscosity of alcohols depends on a number of factors: - the strength of intermolecular forces - the size of the molecule - temperature These factors can be investigated using alcohols and apparatus from the lists below - Scottish Highers Chemistry - Question 4 - 2016
Step 1
Step 2
Identify the apparatus to be used
Answer
For this experiment, I would use:
- Beakers: to hold the alcohol samples.
- Thermometer: to measure and maintain the temperature of the alcohols during the experiment.
- Ball bearing: to test the viscosity by measuring the time it takes for the ball bearing to sink in the different alcohols.
Step 3
Describe the experimental procedure
Answer
- Prepare equal volumes of methanol and ethanol in separate beakers.
- Use the thermometer to ensure both solutions are at the same initial temperature before starting the experiment.
- Drop a ball bearing into each beaker simultaneously and start a timer.
- Measure the time taken for the ball bearing to sink to the bottom of the beaker in both alcohols.
- Record the times and compare the viscosities based on the sinking times, relating the observations to the differences in intermolecular forces and molecular size.