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An ink is a mixture of coloured substances dissolved in water - Edexcel - GCSE Chemistry Combined Science - Question 4 - 2018 - Paper 1
Question 4
An ink is a mixture of coloured substances dissolved in water. (a) Which method is used to separate the coloured substances in the ink? A. chromatography B. crysta... show full transcript
Worked Solution & Example Answer:An ink is a mixture of coloured substances dissolved in water - Edexcel - GCSE Chemistry Combined Science - Question 4 - 2018 - Paper 1
Step 1
Which method is used to separate the coloured substances in the ink?
Answer
The correct method to separate the coloured substances present in the ink is chromatography. This technique utilizes the different solubilities and adsorptions of the coloured substances to achieve separation, allowing each component to move at varying rates through a medium.
Step 2
Cold water flows through the condenser.
Answer
On Figure 6, indicate the flow of water as follows:
- Use an arrow pointing towards the bottom of the condenser to show where cold water enters.
- Use another arrow pointing out from the top of the condenser to illustrate where the warmer water exits.