Chromatography

Chromatography

1. IDENTIFYING SUBSTANCES

   • Put spots of each mixture on filter paper. put the paper in a beaker with a solvent like water. The spots must not touch the water.
     • the solvent seeps up the paper, taking the samples with it. the different chemicals in the samples form different spots on the paper. The amount of different spots from one sample shows how many different substances are in it.

2. Rf VALUE

   • The R value is the ratio between the distance travelled by the dissolved substance and the distance travelled by the solvent.
     • Formula for finding the Rf value:

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