Flashcards
C5 Chromatography
Flashcards do conjunto (8)
- 1What is chromatography?An analytical method used to separate the substances in a mixture.
- 2What are the 2 phases of chromatography?The mobile phase, and the stationary phase
- 3During a chromatography experiment, how do the substances act?they constantly move between the mobile and stationary phase - an equilibrium is formed
- 4Why do substances in a mixture separate during chromatography?different chemicals have different distributions between the same phase, so they'll spend different amounts of time in each phase.
- 5What causes a substance to move further through the stationary phase?As the mobile phase moves up through the stationary phase, any substances attracted to the mobile phase, move with it. The more time, a substance spends in the mobile phase, the further it moves through it.
- 6What will happen if a pure substance is used during chromatography?Only one spot will appear
- 7What will happen if a mixture is used during chromatography?Multiple spots will appear (as long as they have different distributions)
- 8How do you carry out a paper chromatography experiment?1. draw a line near the bottom of the filter paper in pencil.
2. add a spot of the substance on the line, and play the sheet in a beaker of solvent
3. place a lid on top to minimise evaporation
4. when the solvent reaches the top draw a line and let the paper dry.
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- Descrição
- GCSE Chemistry (C5 chemical analysis) FlashCards sobre C5 Chromatography, criado por lily bevan em 29-04-2018.
- Criado por
- lily bevan · abr 2018
- Atualizado
- 29 abr 2018
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