1 Estimate the weight of a 12 V, 100 A h lead-acid battery. Do this by calcu- lating the reactant masses participating in the overall chemical reaction. Also, assume that the mass of H,0 in the electrolyte is twice the mass of H,SO,. Neglect battery casing mass, electrode grid mass, separator mass, and current bus mass. (Note that n=2 for Pb and PbO, and n=1 for H,SO,.)

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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.