Answer to Question #76485 in General Chemistry for ira

Question

The following equilibrium equation describes the dissolution of siderite to divalent iron ions and carbonate ions:

1. Is the extent of siderite dissolution (in equilibrium) a function of the ionic strength of the solution? Calculate the dissolution constant for I=0.5M. Will the dissolution be to a higher or lower degree at a higher ionic strength? Does the ionic strength have a significant impact in this case, and if so, for what reason?
2. How does the increase in temperature influence the level of siderite solubility at equilibrium? Calculate for 450C and explain.
Data: ΔHf(FeCO3)=-737 kJ/mol , ΔHf(Fe2+)=-89.1 kJ/mol, ΔHf(CO32-)=-677 kJ/mol

Answer 1

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