A student does an experiment to determine the molar solubility of magnesium fluoride. She constructs a voltaic cell at 298 K consisting of a 0.713 M magnesium nitrate solution and a magnesium electrode in the cathode compartment, and a saturated magnesium fluoride solution and a magnesium electrode in the anode compartment. If the cell potential is measured to be 8.13×10-2 V, what is the value of Ksp for magnesium fluoride at 298 K based on this experiment?   Ksp for MgF2 = ------

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