What is fractional distillation and how does it work.

Fractional distillation uses a fractional distillation tower, split into different layers each with a different temperature. It is used to sperate crude oil into the many different fuels used commonly in everyday use and it is also commonly used to seperate liquified air.
It works by seperating the fractions to different temperatures, hotter at the bottom, and cooler at the top. What this does is allows only the more volatile fuels to be turned into a gas at each stage, and the less volatile stay as a liquid at the current stage of the process.

Related Chemistry GCSE answers

All answers ▸

A chemist needs to neutralise aqueous hydrochloric acid solution (currently pH 1) to pH 7 or higher, so it can be safely disposed of. They have access to solid NaCl, NaBr and Na2CO3.


balance this equation C8H18 + O2 ---> CO2 + H2O


How does an increase in temperature affect the rate of a reaction?


Magnesium oxide contains magnesium ions (Mg2+) and oxide ions (O2–). Describe what happens when magnesium atoms react with oxygen atoms to produce magnesium oxide.