A student does an experiment to determine the molar solubility of lead bromide. He constructs a voltaic cell at 298 K consisting of a 0.883 M lead nitrate solution and a lead electrode in the cathode compartment, and a saturated lead bromide solution and a lead electrode in the anode compartment. If the cell potential is measured to be 5.48×10-2 V, what is the value of Ksp for lead bromide at 298 K based on this experiment? KspforPbBr2=