Learning objectives
Write Ksp expressions and units for sparingly soluble salts such as AgCl, CaF₂ and Ag₂CrO₄
Calculate Ksp from concentrations or solubility and calculate solubility from Ksp, converting between g dm⁻³ and mol dm⁻³
Explain the common ion effect and calculate the lower solubility of a salt in a solution that already contains one of its ions
Define the partition coefficient Kpc and calculate it, or the mass of solute extracted, for a solute distributed between two immiscible solvents
Predict and explain whether a solute favours the polar or the non-polar layer, and so whether Kpc is large or small, from the polarity of the solute and of each solvent
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