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solubility:
eqm concentration of a substance in sol’n at a given temp
to determine solubility
take a given amount of a saturated sol’n and evaporate the water to determine the mass of the solute present
important to use a saturated sol’n bc this shows that the solubility point has been reached
BaSO4 has low solubility
does not mean that NO BaSO4 could be dissolved in water
some will dissolve
therefore, very little BaSO4(s) is required to form a saturated sol’n and in effect set up an eqm
this particular eqm constant occurs so frequent, we give it its own name; Ksp
Ksp stands for
Solubility Product Constant