Edexcel IAL Chemistry A2 20.5 preparation and purification techniques
Edexcel IAL Chemistry A2 20.5 preparation and purification techniques
Match the technique to the purpose: recrystallise impure solids, dry cloudy organic layers, separate immiscible phases and use reflux or distillation to control volatile mixtures.
How this is tested
- Order recrystallisation steps using minimum hot solvent, filtration and cold washing.
- Explain solvent extraction using immiscible layers and greater solubility in one solvent.
- Choose drying agents, reflux, distillation or steam distillation for purification tasks.