PHC320H1 Lecture Notes - Lecture 16: Miscibility, Chemical Polarity, Partial Pressure
24 Mar 2015
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It is clear that the most specific type of interactions which are responsible for solvent dissolution is solvent solute interaction. Physical chemistry solubility is given in mole fraction=mole of solute/(mole of solute+moles of solvent) Or solubility = mole/l (molarity) or molality (mole/kg) Molarity is # of moles of solute dissolved in litres in volume of solution (not solvent, refers to entire solution) molality moles of solute /kg of solvent. G/l or g/g instead of moles we can use mass of solute or volume/volume solubility= number of litres of solvent required to dissolve 1 g of solute. Gases in liquids solubility if solubility isn"t very large, most gases are only sparingly soluble in liquids, if solubility not large, there is henry"s law that regulate the solution of gases in liquids. X=mole fraction of gas in solution (unitless) kh= henry"s constant. X is unitless so henry"s constant is a measurement of pressure(bar or pascal) , kh is unit of pressure.
