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2 (a) A separating funnel is shown - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Question 2
2 (a) A separating funnel is shown. The separating funnel can be used to separate two immiscible liquids, such as oil and water. Describe how you would use a separ... show full transcript
Worked Solution & Example Answer:2 (a) A separating funnel is shown - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Step 1
Describe how you would use a separating funnel to separate two immiscible liquids.
Answer
To separate two immiscible liquids using a separating funnel, follow these steps:
- Allow the two liquids to settle and form distinct layers.
- Open the tap of the separating funnel to let the lower layer drain out into a container.
- Once the first layer is fully drained, close the tap.
- Pour the remaining upper layer out from the top to complete the separation.
Step 2
Use the results of the chromatography experiment to describe the colours present in the brown food colouring.
Answer
The results from the chromatography experiment show that the brown food colouring contains green and red colours. This indicates that the brown is a mixture of these two colours.
Step 3
Explain what happens when each solution is tested in the circuit shown.
Answer
When the solutions are tested in the circuit:
- Sodium chloride solution conducts electricity because it contains ions which enable electrical flow, causing the bulb to light up.
- Sucrose solution does not conduct electricity as it lacks ions, so the bulb does not light up.
Step 4