Video walkthroughs
Narrated walkthroughs of exam-style questions from this chapter of the book, showing where each mark comes from. Try the question first, then watch. Captions are available in the player.
Reading a chromatogram
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Identifying ions
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Does a matching Rf prove it?
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Premium includes a walkthrough video for the key questions in every chapter. Each one is narrated step by step, with captions.
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