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What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Describe and understand the terms: (a) stationary phase, for example aluminium oxide (on a solid support); (b) mobile phase, a polar or non-polar solvent; (c) Rf value; (d) solvent front and baseline.
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Interpret Rf values.
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Explain the differences in Rf values in terms of interaction with the stationary phase and of relative solubility in the mobile phase.
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