Purity, Formulations & Chromatography (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main aim of paper chromatography?
What is the main aim of paper chromatography?
To identify unknown substances
What is the stationary phase in paper chromatography?
What is the stationary phase in paper chromatography?
The chromatography paper
What is the mobile phase in paper chromatography?
What is the mobile phase in paper chromatography?
The solvent
Which safety equipment must always be worn during this practical?
Which safety equipment must always be worn during this practical?
Eye protection
Where should the solvent level be compared to the start line?
Where should the solvent level be compared to the start line?
Below the start line
Why must you use a pencil, not a pen, to draw the start line?
Why must you use a pencil, not a pen, to draw the start line?
Ink will run in the solvent
Which substances travel furthest up the paper?
Which substances travel furthest up the paper?
Those more attracted to the solvent
If solvent moved 75 mm and a substance moved 60 mm, what is the value?
If solvent moved 75 mm and a substance moved 60 mm, what is the value?
What range of values can an value have?
What range of values can an value have?
Between 0 and 1
How many spots does a pure substance produce on chromatography paper?
How many spots does a pure substance produce on chromatography paper?
Only one spot
Why must you mark the solvent front immediately after removing the paper?
Why must you mark the solvent front immediately after removing the paper?
It disappears when the paper dries
What does a mixture produce on chromatography paper?
What does a mixture produce on chromatography paper?
Multiple spots