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Choose the one alternative that best completes the statement or answers the question. CalculateKsp for PbI2 at 25°C based on the following data: Species ΔG°f, kJ/mol Pb2+ (aq) -24.4 I- (aq) -51.6 PbI2 (s) -173.6 A) 9 × 10-9 B) 4 × 10-31 C) 5 × 10-5 D) 8 × 10-18