Question
Show transcribed image text A basic solution contains the iodide and phosphate ions that are to be separated via selective precipitation. The I- concentration, which is 0.000081 M, is 10,000 times less than that of the PO3-4 ion at 0.81 M. A solution containing the silver(l) ion is slowly added. Answer the questions below. Ksp of Agl is 8.3 times 10-17 and of Ag3PO4, 8.9 times 10-17. Calculate the minimum Ag+ concentration required to cause precipitation of Agl. Calculate the minimum Ag+ concentration required to cause precipitation of Ag3PO4. Which salt will precipitate first? Calculate the percentage of the precipitated anion remaining in solution before the precipitation of the second salt occurs. Is the separation of the I- and PO3-4 ion complete (is the percentage of “remaining” ion less than 0.10% or its original value)?
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