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Chromatography and separation techniques · A Level Chemistry · Courselo

Courselo

Chemistry
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Analytical, practical and synoptic skills

Chromatography and separation techniques

Analytical, practical and synoptic skills · Lesson 1 of 8

Lesson 1 of 8

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Unit 8

Analytical, practical and synoptic skills

8 lessons · 13 h 15 min of study

Chromatography and separation techniquesReading · 0%
Infrared spectrometry, mass spectrometry and structure deduction2 h of study
NMR spectroscopy for structure determination2 h 15 min of study
Volumetric analysis, calorimetry and standard laboratory methods2 h of study
Preparing, purifying and characterising products1 h 15 min of study

This unit is ≈16% of the Chemistry, across 8 lessons. Full syllabus

Lesson 1 of 8 · Analytical, practical and synoptic skills

Chromatography and separation techniques

3 quick checks≈2% of the testCore: Core: tested on most papers

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By the end you’ll be able to

Explain the principles of separation by chromatography in terms of differential distribution between a mobile phase and a stationary phase.
Carry out and interpret paper chromatography and thin-layer chromatography, including the choice of baseline, solvent level, locating spots and using a chromatogram to compare substances.

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Adaptive questions on chromatography and separation techniques.

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Processing data, uncertainty and graphical analysis1 h 15 min of study

Planning investigations, evaluation and synoptic comprehension1 h 45 min of study

Qualitative organic analysis1 h 15 min of study

Calculate and use $R_f$ values from chromatograms, and evaluate the limitations of $R_f$ data for identification under different experimental conditions.

Interpret chromatographic evidence to assess the number of components in a mixture and the purity or identity of a substance by comparison with standards.

Explain the use of gas chromatography and related retention data for separating volatile compounds, including interpretation of peak position and peak area where required.

Select appropriate separation or purification techniques for mixtures and reaction products, including filtration, crystallisation, solvent extraction, distillation and chromatography, with justification based on physical properties.

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