Which of the following is NOT an advantage of a potentiometric titration over a

Question

Which of the following is NOT an advantage of a potentiometric titration over a direct potentiometric measurement? Potentiometric titration yields equivalence point data that are independent of E_cell and free of uncertainties involving the junction potential. In potentiometric titration, electrode fouling and non-Nernstian behavior are not as serious. In potentiometric titration, the reference electrode potential absolutely must be known. In potentiometric titration, the result is analyte concentration even thought the electrode responds to activity, thus ionic strengths are not important.

Explanation / Answer

The advantages are

1) It yields equivalence point data that are independent of E cell and free of uncertainties involving the junction potential

2) electrode fouling and non-Nernstian behavior are not as serious

3) the reference electrode potential does not need to be known [so the given third statement is not advantage]

4) The result is analyte concentration even though the electrode responds to activity, thus ionic strengths are not important

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