Download - Heterogeneous Equilibria
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Heterogeneous Equilibria
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Heterogeneous Equilibria. . . are equilibria that involve more than one phase.
CaCO3(s) CaO(s) + CO2(g)
K = [CO2]
The position of a heterogeneous equilibrium does not depend on the amounts of pure solids or liquids present.
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Solubility Products (Ksp) Refer to the dissolution of a solid Temperature dependent, [solid]=1 Unique for each solid, tabulated values
In general:
KnAm nK+ + mA-
Ksp = [K+]n [A-]m
The Ksp is the ion product of a saturated solution
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Precipitation and the Solubility Product:
Ksp of a salt is a quantitative statement of the
limit of solubility of the salt
1. The ion product is < Ksp The soln is unsaturated, additional solid can be dissolved in it.
2. The ion product is > Ksp The soln is super saturated, precipitation will occur.
3. The ion product = Ksp The soln is saturated
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Solubility Products, Ksp
Ksp is the solubility product. The equilibrium constant for the solid dissolving to aqueous ions (solid ions).
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Solubility Products, Ksp
Nearly all ionic solids dissolve somewhat in water.