Problem 558
Design an experiment which demonstrates that both positive and negative ions move in electrolytic conduction.
Problem 559
Would you expect the mobility of an electrolytic ion to increase or decrease for each of the following? (a) increasing the size of the ion;(b) increasing charge on the ion; (c) increasing temperature and (d) placing it in a solvent of lower viscosity.
Problem 560
Calculate the theoretical quantity of chlorine obtainable by the electrolysis of \(2.0 \mathrm{~kg}\) of a \(20 \%\) sodium chloride solution. What other products would be obtained and what would be the weight of each?
Problem 564
Two electrochemical cells were fitted with inert platinum electrodes and connected in series. The first cell contained a solution of a metal nitrate; the second cell, metal sulfate. After operation of the cell for a prescribed period of time, it was observed that \(675 \mathrm{mg}\) of the metal had been deposited in the first cell and \(76.3 \mathrm{ml}\) of hydrogen gas \(\left(25^{\circ}\right.\) and \(1 \mathrm{~atm}\) ) evolved in the second. Determine the equivalent weight of the metal.
Problem 565
In an electrolytic cell, a liter of a \(1 \mathrm{M}\) aqueous solution of \(\mathrm{MnO}_{4}^{-}\) is reduced at the cathode. Determine the number of faradays required for each of the following to be made a) a solution that is \(.01 \mathrm{M} \mathrm{MnO}_{4}^{2-}\); b) 1 gram of \(\mathrm{MnO}_{2}\); c) 1 gram-equivalent of Min metal.
Problem 566
Balance the following reaction in basic aqueous solution: \(\mathrm{SO}^{2-}{ }_{3}+\mathrm{CrO}^{2-}{ }_{4} \rightarrow \mathrm{SO}^{2-}{ }_{4}+\mathrm{Cr}(\mathrm{OH})_{3}\)
Problem 567
Balance the following reaction in acidic aqueous solution: \(\left(\mathrm{ClO}^{-}_{3}\right)+\mathrm{Fe}^{2+} \rightarrow\left(\mathrm{Cl}^{-}\right)+\mathrm{Fe}^{3+}\)
Problem 569
Balance the equation for the following reaction taking place in aqueous basic solution: \(\mathrm{MnO}^{-}_{4}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{MnO}_{2}+\mathrm{O}_{2}\)
Problem 570
Determine the volume in milliliters of \(20 \mathrm{M} \mathrm{KMnO}_{4}\) required to oxidize \(25.0 \mathrm{ml}\) of \(40 \mathrm{M} \mathrm{FeSO}_{4}\), in acidic solution. Assume the reaction which occurs is the oxidation of \(\mathrm{Fe}^{2+}\) by \(\mathrm{MnO}^{-}{ }_{4}\) to give \(\mathrm{Fe}^{+3}\) and \(\mathrm{Mn}^{2+}\).
Problem 574
You pass a \(1.0\) amp current through an electrolytic cell for \(1.0 \mathrm{hr}\). There are 96,500 coul in a Faraday (F). Calculate the number of grams of each of the following that would be deposited at the cathode: (2) Cu from a \(\mathrm{Cu}^{+2}\) solution and (1) Ag from an Ag ' solution, (3) A.1 from an \(\mathrm{Al}^{3+}\) solution.
