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Lead iodate , Pb(IO3)2 , is a slightly soluble salt with a Ksp of 2.6x10–13 at 25°C. To 35.0 mL of 0.150 Pb(NO3)2 solution is added 15.0 mL of 0.800 M KIO3. A precipitate of Pb(IO3)2 results. What are the [Pb2+] and [IO3 ] in the final solution?

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Using bounce-back method, first assume all Pb2+ reacts with all IO3 ion to produce Pb(IO3)2, and then some of the precipitate dissolves back to the ions.

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