Question

20. A galvanic (voltaic) cell is constructed froma half-cell containing a solid aluminum electrode dipped in a 1.0 M Al(NO3)3 solution and a half-cell containing a solid indium electrode in contact with a 1.0 M In(NO3)3 solution. The half-cells are linked by an external circuit (a wire) and by a KCl salt bridge. The cell generates a standard voltage of 1.32 V and the indium electrode is positive. The standard half-cell reduction potential for aluminum, E°(Al3*/Al), is listed in the Table of Standard Reduction Potentials at the end of the exam. What must be the standard reduction potential for the In34/In half-cell? (а) -2.98 V (b) -1.32 V (c) -0.34 V (d) +0.34 V (e) +2.98 V

Answer 1

In a .gnlvanie cunodle elecbrochantical cell, the cell negativey chaed &cathede is chargad The potentral dflerence betnween the two elecrodes f gawanic eell the cell potenral called Now en in The queou, Endium eteatnode acls ous as pasitively chgd it cathode std E cel (cell pofeutral Eanode E cathode We have Ecell E TnstIn - TVl3 1.32V En3 (In (6v) E A131AI .66V CGiven) (132-1.66)V Est EyaIn 0-34V