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8.1 Purity, formulations and chromatography

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Question 16
H

A substance gave a single spot in solvent 1 and two spots in solvent 2.

What do these results show?

[1]
A

The substance is pure, because it gave one spot in solvent 1

B

The substance is pure, because RfR_fRf​ values change with the solvent

C

The substance is a mixture, because RfR_fRf​ values change with the solvent

D

The substance is a mixture, because its components separated in solvent 2

Markscheme

8.1 Purity, formulations and chromatography Questions

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

40 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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