Heating under reflux
What Heating under reflux means in Chemistry A-Level, as defined for OCR.
Definitions of Heating under reflux
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Reference: OCR
A technique in which a vertical condenser returns condensed vapour to the flask, so the mixture can be boiled for a long period without losing solvent or volatile reactants.
Prolonged heating carried out with a reflux condenser, with joints greased and secured and condenser water flowing in at the lower inlet and out at the upper outlet.
A vertical condenser returns condensed vapour to the flask, so a reaction can be heated for a long time without losing volatile reactants or solvent.
Boils a reaction mixture while the condenser returns condensed vapour to the flask, allowing prolonged heating without loss of solvent.
The mixture is heated under reflux so the reaction can reach equilibrium without losing volatile components.
A technique used to complete the preparation reaction before isolating the solid.
Topics that use Heating under reflux
- Alcohols, haloalkanes and analysis - 4.2.3 Organic synthesis (OCR A-Level)
- Carboxylic acids and esters (OCR A-Level)
- Nitrogen compounds, polymers and synthesis - 6.2.5 Organic synthesis (OCR A-Level)
- Use of apparatus and techniques (OCR A-Level)
Related terms
- Distillation
- Filtration under reduced pressure
- Functional group interconversion
- Identifying the organic layer
- Intermolecular forces and physical properties
- Acid-catalysed hydrolysis
- Acid–base behaviour of products
- Acyl chlorides as reactive acid derivatives
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