• The solubility of a substance is the amount of that substance that is required to form a saturated solution in a given amount of solvent at a specified temperature.
  • Solubility is often measured as the grams of solute per 100 g of solvent.
  • For gases, the pressure must also be specified.
  • The effect is difficult to predict and varies widely from one solute to another.
  • Several substances – HCl, NH3, and SO2 – have solubile that decreases as temperature increases.
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