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An ink is a mixture of coloured substances dissolved in water - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Question 6
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 chromotography B crystall... show full transcript
Worked Solution & Example Answer:An ink is a mixture of coloured substances dissolved in water - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Step 1
Which method is used to separate the coloured substances in the ink?
Answer
The method used to separate the coloured substances in the ink is chromatography. This technique involves the process of moving a solvent through a medium, allowing different substances to travel at different rates, effectively separating them.
Step 2
The apparatus shown in Figure 9 can be used to separate water from ink.
Answer
The apparatus depicted in Figure 9 is typically a distillation setup. This method is useful for separating components based on different boiling points. In this context, water can be separated from ink due to its lower boiling point compared to the ink's components. The water vaporizes, travels through the condenser, and is collected as distillate, while the ink remains in the distillation flask.