Sulfate ion can be determined by an amperometrie titration procedure usingPb'+ as the
Chapter 25, Problem 25-14(choose chapter or problem)
Sulfate ion can be determined by an amperometrie titration procedure usingPb'+ as the titrant. If the potential of a rotating mercury film electrode is adjustedto -1.00 V versus SCE, the current can be used to monitor the Pb ,+ concentrationduring the titration. In a calibration experiment, the limiting current,after correction for background and residual currents, was found to be related tothe Pb'" concentration by i, = 10crb'" where i, is the limiting current in mA andCrb" is the Pb 2+concentration in mM. The titration reaction isIf 25 mL of 0.025 M Na,S04 is titrated with 0.040 M Pb(N03)z, develop the titrationcurve in spreadsheet format and plot the limiting current versus the volumeof titrant.
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