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This quiz contains 6 questions from a mix of 1 subtopics.
The coefficient is the equilibrium constant that relates the concentration of a solute partitioned between two immiscible at a particular temperature.
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What does a partition coefficient (Kpc) describe?
the rate at which a solute moves between two solvents
the polarity of a solute molecule
the distribution of a solute between two immiscible solvents at equilibrium
the solubility of a solute in a single solvent
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What information is needed to calculate the partition coefficient (Kpc)?
the temperature of the system
the equilibrium concentrations of the solute in each solvent layer
the initial concentrations of the solute in each solvent layer
the volume of each solvent layer
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What does a partition coefficient (Kpc) greater than 1 indicate?
the solute is insoluble in both layers
the solute is equally soluble in both layers
the solute is more soluble in the aqueous layer
the solute is more soluble in the organic layer
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What will happen to solutes with higher solubility in the mobile phase during paper chromatography?
they will have smaller Kpc values and move slower up the paper
they will move down the paper
they will not move at all
they will have larger Kpc values and move faster up the paper
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A solution of butanedioic acid (BDA) in ether contains 0.40 mol of BDA in 25 cm3 of ether. This solution is shaken with 60 cm3 of water. The mass of BDA extracted into the aqueous layer after shaking was 0.080 mol.
Calculate the value of the partition coefficient (Kpc).
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