IB
IBO
Chemistry
May 2011
QP-201105-Chemistry-P3(TZ1)-SL · Question 3
Question (excerpt):
A3. A sample of food colouring was analysed using thin-layer chromatography to check whether it contained a banned substance. The Rf value of the banned substance is 0.25 under the same conditions. B …
A3. A sample of food colouring was analysed using thin-layer chromatography to check whether it contained a banned substance. The Rf value of the banned substance is 0.25 under the same conditions. B …
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