Different components of a mixture have different Rf values due to________________?
Correct answer: C. Their different distribution coefficients in the solvent
- A. Polar solvent used
- B. Combination of solvents used
- C. Their different distribution coefficients in the solvent
- D. Distributive law
Explanation
In chromatography, each component partitions differently between the stationary phase and the moving solvent, giving it a different distribution coefficient and therefore a different Rf value. A student may choose a polar solvent, but solvent polarity affects the separation conditions rather than being the fundamental reason different substances have different Rf values.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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