CHEM 21131 Physical Chemistry Laboratory
2014
Pre Lab – Experiment C5
Determination of the thermodynamic solubility product of KHT
1. Describing all the terms state the Debye Hukel equation.
2. What are the assumptions of Debye Hukel equation?
3. What is the relationship between activity and concentration?
4. Consider a solution of 0.01 M MgCl2 (aq) with an ionic strength of 0.030 M. What is the
mean activity coefficient?
5. Use the following equilibrium to demonstrate why the Ksp expression does not include
the concentration of Ba3(PO4)2 in the denominator.
Ba 3 (PO4 ) 2 (s) ⇌ 3Ba  (aq)  2PO34 (aq)
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