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2.1 Purity and separating mixtures

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Question 22
F

On a paper chromatogram, spot X has an Rf value of 0.40. Spot X has moved 3.2 cm from the start line.

Spot Y, on the same chromatogram, has moved 5.6 cm from the start line.

What is the Rf value of spot Y?

[1]
A

0.23

B

0.57

C

0.70

D

1.75

Markscheme

2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

51 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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