Ksp[1] - CHEMICAL EQUILIBRIUM SOLUBILITY PRODUCT CONSTANTS...

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SOLUBILITY PRODUCT CONSTANTS We have discussed the chemical equilibrium of compounds that are soluble in water. In this section, we will examine the equilibrium of insoluble ionic compounds. Examples; AgCl, BaSO 4 , Ca 3 (PO 4 ) 2 . SOLUBILITY PRODUCT CONSTANTS (Ksp) In water, ionic solids dissociate into their ions. Ionic compounds that are classified as soluble dissociate completely Ionic compounds that are classified as insoluble dissociate slightly. For such compounds, equilibrium is reached when no more solid can be dissolved. The solution is said to be saturated . This equilibrium is described in the following chemical equation: MX(s) M + (aq) + X - (aq) For the reversible reaction illustrated above, one can express the concentrations at equilibrium in term of the equilibrium constant. This constant is called the “solubility product constant, Ksp”: Ksp = [M + ][X - ] MX is a solid and therefore, it is not included in the Ksp expression. Ksp is temperature dependent just like any other equilibrium constant.
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This note was uploaded on 05/19/2011 for the course CHEM 51615 taught by Professor Fatima during the Spring '11 term at University of Texas.

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Ksp[1] - CHEMICAL EQUILIBRIUM SOLUBILITY PRODUCT CONSTANTS...

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