Physical Chemistry Practicals (A Level only) (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Where should the pencil line be drawn on the filter paper?
Where should the pencil line be drawn on the filter paper?
1 cm above the bottom
How many drops of acetone are added when grinding the leaf sample?
How many drops of acetone are added when grinding the leaf sample?
Approximately 20 drops
Where should the solvent level be when the filter paper is suspended in the beaker?
Where should the solvent level be when the filter paper is suspended in the beaker?
Below the pencil line
Which piece of equipment is used to apply the pigment extract onto the pencil line?
Which piece of equipment is used to apply the pigment extract onto the pencil line?
Capillary tube
What is the formula for calculating the value?
What is the formula for calculating the value?
What happens to pigments with lower affinity to the chromatography paper?
What happens to pigments with lower affinity to the chromatography paper?
They travel further up the paper
What does a higher value indicate about a pigment?
What does a higher value indicate about a pigment?
More soluble or less affinity for paper
Why should chromatography solvent be used in a fume cupboard?
Why should chromatography solvent be used in a fume cupboard?
It is harmful by inhalation
When should the solvent front be marked with a pencil?
When should the solvent front be marked with a pencil?
Immediately after removing the paper
Why is the pigment spot application repeated several times?
Why is the pigment spot application repeated several times?
To concentrate the spot