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A solution is prepared by adding some solid Pblz to water and allowing the solid to come to equilibrium with the solution. The equilibrium constant

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A solution is prepared by adding some solid Pblz to water and allowing the solid to come to equilibrium with the solution. The equilibriumconstant for the reaction below is Kc = 7.9x10'9. Pbl2(s) : Pb2+(aq) + 2 i-(aq)What is the equilibrium concentration of sz” in the solution? Assume that some of the solid remains undissolved. Give your answer in moles per litre, accurate to two significant figures. Do not include units as part of your answer. (Enter1.23x10-5 as 1.23e—5.) Number
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