CH-472
Chromatography and Rf values
Chemistry · Secondary 3 · Hard · Chromatography and Rf values
A solution contains two food dyes, P and Q. Their known values in ethanol are 0.20 and 0.65. On a chromatogram, dye P is found 1.0 cm from the start line. Where should dye Q appear if the solvent front is 5.0 cm from the start line?
- 0.65 cm from the start line
- 1.3 cm from the start line
- 3.3 cm from the start line
- 5.0 cm from the start line
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