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8.1 Purity, formulations and chromatography

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Question 13

A laboratory technician uses paper chromatography to test a green colouring extracted from spinach leaves.

In solvent X, the colouring produces one spot. The technician claims that the colouring is pure.

The test is repeated using solvent Y.

Which result would show that the technician's claim is incorrect?

[1]
A

The single spot travels a different distance in solvent Y.

B

The spot remains on the origin line in solvent Y.

C

The solvent front travels further in solvent Y than in solvent X.

D

Two separate spots form when solvent Y is used.

Markscheme

8.1 Purity, formulations and chromatography Questions

  1. GCSE
  2. /Chemistry
  3. /8.1 Purity, formulations and chromatography

113 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.

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