Edexcel GCSE Chemistry · 1CH0
Specification 8.3 · Paper 2
Revise: Fractional DistillationThe resulting hot mixture of hydrocarbon vapours enters a fractionating column near its bottom.
Loading…
Loading…
Loading…
GCSE Chemistry · key term
A tall industrial vessel that is hot at the bottom and progressively cooler towards the top, allowing different fractions to condense at different levels.
Used by Edexcel and OCR
Specification 8.3 · Paper 2
Revise: Fractional DistillationThe resulting hot mixture of hydrocarbon vapours enters a fractionating column near its bottom.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A column that improves the separation of liquids by allowing repeated evaporation and condensation.
For fractional distillation, explain what the fractionating column does rather than saying only that the liquids have different boiling points.
Create a free account to read GCSE Chemistry revision notes for your exam board and track your progress.
Fractional distillation adds a fractionating column between the heated flask and the condenser. Vapour rises through the column, cooling and condensing repeatedly. The higher-boiling liquid is more likely to condense and run back into the flask, while vapour richer in the lower-boiling liquid reaches the condenser.