In an experiment involving Pt electrode in H*/H2 electrode, the following data were obtained. Determine a and i, n /mV: 50 100 150 200 250 i / mAcm?: 2.66 8.91 29.9 100 335 evaluate a and i. (Hint: Solve Butler-Volmer Equation for large value of n (Tafel Equation)).

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Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.