Paper Chromatography Quiz

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Questions and Answers

What is the purpose of the stationary phase in paper chromatography?

  • To separate the components of the sample based on their affinity for the stationary phase (correct)
  • To facilitate the movement of the sample along the paper
  • To hold the sample in place
  • To react with the sample and produce color changes

Why is it important to ensure that the solvent front does not reach the top of the paper in paper chromatography?

  • To prevent overdevelopment of the chromatogram (correct)
  • To prevent the sample from escaping the paper
  • To ensure that the components of the sample are well-separated
  • To avoid contamination of the sample

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Study Notes

Paper Chromatography

  • The stationary phase in paper chromatography is a porous material, typically paper, that separates the components of a mixture based on their differing affinities for the stationary phase and the mobile phase (solvent).
  • The stationary phase acts as a medium for the separation of components, allowing them to interact and differentiate according to their properties.

Importance of Controlling the Solvent Front

  • Ensuring the solvent front does not reach the top of the paper is crucial in paper chromatography to prevent the separated components from being washed off the paper.
  • If the solvent front reaches the top, it can cause the components to mix again, leading to a loss of separation and inaccurate results.
  • Controlling the solvent front allows for a clear and distinct separation of components, making it easier to identify and analyze the components of a mixture.

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