Solubility Equilibria Between Crystals and Saturated Solutions

Solubility Equilibria Between Crystals and Saturated Solutions 

We next consider the solubility of a pure salt, strong electrolyte, in an aqueous solution saturated arith respect to that salt. The simple dissociation reaction can be represented as  

The thermodynamic Kgp can be evaluated from tabulated values of AGf which are found in several sources. For example  

The thermodynamic solubility product of NaCl, assuming our values of the free energy of formation are correct, is for the thermodynamic temperature of 25 Celsius. If we make the simplifying assumption of a solution where y s si, then the salt solubility is 6.248 gmols/kg HjO which is reasonably close to the value given in Linke/SeideU (2) of 6.146 gmoles/kg HjO. 

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