question_answer

  (a) What type of a battery is lead storage battery? Write the anode and cathode reactions and the overall cell reaction occurring in the operation of a lead storage battery. (b) Calculate the potential for half-cell containing (ag), and (ag) The half-cell reaction isand the standard electrode potential is given as E° = 1.33 V.                                                                                                                                             [2+3] Or (a) How many moles of mercury will be produced by electrolyzing solution with a current of 2.00 A for 3 hours? (b) A voltaic cell is set up at 25°C with the following half-cells (0.001 M) and (0.50M). Write an equation for the reaction that occurs when the cell generates an electric current and determine the cell potential. (Given,)                                                                                           [2+3]

Answer:

  (a) Lead storage batteries It is a secondary battery. A typical 12-V battery consists of six cells connected in series, each cell providing a potential of about 2 V. The anode, a series of lead grids packed with spongy lead, and the cathode a second series of grids packed with lead dioxide, dip into the electrolyte (which is an aqueous solution of 38% by weight.) When the cell is discharging   (providing current) the reactions are Anode       [1] Cathode Overall        [1] (b)                                                             [3] Or (a) [2] (b) Cell reactions Oxidation Reduction                     [1]