24.1) What are the galvanic cells that you will set up for measuring the solubility products of BaSO4 AgI, Ag2CrO4 an Fe (OH)3. Can you estimate the values of the solubility products?
24.2) During a potentiometric titration such as the one discussed in the present lecture, after the addition of some Ce4+, two equilibria, Ce4+ + e- Ce3+ and Fe3+ + e- Fe2+ are present in the solution. Both equilibria are "sensed" at the electrode dipping in the solution. Are the electrode potentials for these two equilibria equal?
24.3) List two examples of reactions that can be studied using potentiometric titrations.
24.4) List the pKa and pKb values of 3 to 4 organic acids and bases. Try to rationalise the differences in their pKa (or pKb) values in terms of the differences in the bond strengths/reactivities of the functional groups in the molecules.
24.5) List the names of five sensors that are used commonly in daily life. How many of them are electrochemical sensors?
24.6) Which are some common electrodes (other than the Calomel electrode) that can be used as a reference electrode for measuring pH?
24.7) The solubility of AgBr is 1.5 x 10 -6 mol/kg at 20oC. What is the emf of the cell Ag | AgBr (aq) | AgBr,Ag at this temperature?
24.8) At 25oC, the cell Pt, H2(1atm)| HCl (aq) |AgCl, Ag has an emf of 0.332 at 25oC. What is the pH of this solution? If the H2 | H+ cell is replaced by a calomel electrode, what would be the resulting emf ?
Ce3+ and Fe3+ + e- 
