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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 separa... 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 use a separating funnel for separating two immiscible liquids, follow these steps:
- Pour the mixture of liquids into the separating funnel.
- Allow the liquids to settle into two distinct layers due to their differing densities.
- Carefully open the tap at the bottom of the funnel to release the lower layer into a separate container.
- Once the bottom layer is fully drained, close the tap and pour the remaining upper layer from the top into another container.
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 indicate that the brown food colouring contains two distinct colours: green and red. This suggests that the brown colour is a combination of these two colours.
Step 3
Explain what happens when each solution is tested in the circuit shown.
Answer
When the sodium chloride solution is tested in the circuit, the light bulb will light up, indicating that the ionic compound conducts electricity due to the presence of ions in solution. In contrast, when the sucrose solution is tested, the light bulb will not light up, demonstrating that sucrose, being a covalent compound, does not produce ions in solution and thus does not conduct electricity.
Step 4