What is used as the solvent in the chromatography practical?
Water.
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Where should the origin line be drawn on the chromatography paper?
2 cm from the bottom short edge of the paper.
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What is the purpose of the solvent front line?
To mark how far the solvent travelled up the paper.
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What measurements are needed to calculate Rf values?
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What does a higher Rf value mean?
The higher the Rf value, the further up the chromatography paper the substance travelled.
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Why hang up the chromatography paper to dry before calculating Rf values?
To prevent the spots from continuing to move or diffuse, allowing accurate distance measurements to calculate Rf.
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