In a chromatography experiment, component P travels 3.6 cm and component Q travels 5.4 cm. The solvent front travels 7.2 cm. Which statement correctly compares the two components?

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Question

In a chromatography experiment, component P travels 3.6 cm and component Q travels 5.4 cm. The solvent front travels 7.2 cm. Which statement correctly compares the two components?

Accepted Answer

Component Q is more soluble in the solvent than component P — Award 1 mark for recognising that Q travelled further (5.4 cm vs 3.6 cm), indicating greater solubility in the mobile phase. A is incorrect because P travelled less far, indicating lower solubility. C is incorrect because molecular mass cannot be determined from distance travelled alone. D is incorrect because the Rf values are different (P = 0.5, Q = 0.75).

Answer

Both components have the same Rf value

Answer

Component P is more soluble in the solvent than component Q

Answer

Component Q is more soluble in the solvent than component P

Answer

Component P has a larger molecular mass than component Q

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