When the Hg2+ concentration is 4.78x10^-4 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.416V. What is the Al3+ concentration? 3Hg2+ (aq) + 2Al(s)3Hg(l )+2A13+(aq) Answer:

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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.