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3.2 Methods of separating and purifying substances

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Question 13

F

A student draws the baseline of a chromatogram 1.0 cm above the bottom edge of the paper. The student then measures all distances from the bottom edge of the paper, not from the baseline. The spot is 5.0 cm and the solvent front is 9.0 cm above the bottom edge. What is the correct $R_f\,$ value of the spot?

[1]

A

$0.44$

B

$0.50$

C

$0.56$

D

$0.63$

Markscheme

3.2 Methods of separating and purifying substances Questions

GCSE
Chemistry
3.2 Methods of separating and purifying substances

48 exam-style questions on Edexcel GCSE Chemistry 3.2 Methods of separating and purifying substances, covering 3.2.1 Pure substances and mixtures, 3.2.2 Techniques for separating mixtures, 3.2.3 Paper chromatography and Rf values, and 3.2.4 Making water potable. Each one has a worked solution and a mark scheme showing where the marks go.

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