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Distillation

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by

Harvey Buckle

on 16 March 2017

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Transcript of Distillation

Aim
To know how distillation works as a way to separate
To know when distillation might be used
To observe distillation
To answer related questions
To work on our Science fair project
✳✱*
Starter
Make as many words as you can out of the word 'distillation'
Distillation
Distillation is a process that can be used to separate a pure liquid from a mixture of liquids. It works when the liquids have different boiling points. Distillation is commonly used to separate ethanol - the alcohol in alcoholic drinks - from water.
Distillation
16th March 2017
How?
The mixture is heated in a fl____. Ethanol has a lower b______ p___t than water so it _______tes first. The ethanol vapour is then cooled and c______sed inside the condenser to form a pure liquid. The ________eter shows the boiling point of the pure ethanol liquid. When all the _____nol has evaporated from the solution, the temperature rises and the water evaporates.
Now..
Because they have different boiling points, the substances in crude oil can be separated using fractional distillation. The crude oil is evaporated and its vapours allowed to condense at different temperatures in the fractionating column. Each fraction contains hydrocarbon molecules with a similar number of carbon atoms.
Fractional distillation
Fractional distillation is different from distillation because it separates a mixture into a number of different parts, called fractions. A tall column is fitted above the mixture, with several condensers coming off at different heights. The column is hot at the bottom and cool at the top. Substances with high boiling points condense at the bottom and substances with low boiling points condense at the top. Like distillation, fractional distillation works because the different substances in the mixture have different boiling points.
Questions
Questions 1-5 p.193
Next
Do some work on Science fair
Full transcript