purity

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8 Terms

1
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pure substance

consists of a single element or compound

<p>consists of a single element or compound</p>
2
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formulation

a mixture that has been designed as a useful product

<p>a mixture that has been designed as a useful product</p>
3
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chromatography

used to separate substances

<p>used to separate substances</p>
4
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mobile phase

the solvent in which the sample molecules can move e.g liquid

<p>the solvent in which the sample molecules can move e.g liquid </p>
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stationary phase

the chromatography paper

<p>the chromatography paper</p>
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Rf

distance moved by substance / distance moved by solvent

<p>distance moved by substance / distance moved by solvent </p>
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RP objective

investigate how paper chromatography can be used to separate and identify a mixture of food colourings

<p>investigate how paper chromatography can be used to separate and identify a mixture of food colourings</p>
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RP hypothesis

rf values can be used to identify the components of an unknown mixture by comparison with Rf values of known substances

<p>rf values can be used to identify the components of an unknown mixture by comparison with Rf values of known substances</p>