CH-1372
Separation and purification
Chemistry · Secondary 4 · Easy · Separation and purification
A student wants to separate a mixture of oil and water using a separating funnel. Which step must be done just before opening the tap to collect the lower layer?
- Add a drying agent to the mixture.
- Shake the funnel vigorously and keep it horizontal.
- Allow the mixture to stand until two clear layers form.
- Heat the funnel gently with a Bunsen burner.
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