Question

2. An electrochemical cell is prepared to apply the following half reactions: HUO 3+ (aq) + + OH (24) +1e UO2 (aq) +H2O Ered = -0.48 V Ti* (aq) + 1 e -Ti) Ered = -0.52 V a. Give the balanced net redox reaction in the spontaneous direction. (2 marks) b. What is Eºcell? (2 marks) c. In the working electrochemical cell applying the net redox reaction in the spontaneous direction under standard conditions of concentration, what material must the cathode be made of? What material must the anode be made of? (3 marks) d. What is K. for the net redox reaction at 298 K? (2 marks) e. Starting from the initiation of the electrochemical reaction under standard conditions of concentration, what will be the molar concentration of each ion in the electrolyte solutions once the reaction reaches equilibrium? (3 marks)

Answer 1

HUOg Straw) + oH"() te → 4@+ (aq) + H20 E read -0.48V Titan) + le + Tils) E beled -0,52 V LO 3+ HUC (ar) + oH" (aa) the + Tils) → ugt (aa) + H20 reduction + Titlan) the I - Hugot 10a)+ OH- (aq) + TiB) uotraq) +Tit(aq)thao foll-{-0.48-(-0.52) புரு Oxidation = +0.04 V :: E cell - tve, hence Save on ① referes a cell AGO=-NEF 1x 0.04896500 .: The reaction is spontaneous, Equation to balanced redon reaction in the spontaneou direction. (5) EBC +0.04 EO Ecett cathode in Huo a species is getting getting reduced to ugt, so Huost to not is reduction and cathode in the Silla reduction process occures in cathode . ... Cathode uraniem Similarly in underegoing oniolation, so anode must bel Titaniugn (e) from E Cathosté E anode 3+ is

@ We know, 46%-RT lnke Janef =RT lnke =) like NEF 11 T=2986 RT 1x10.04x65 8.314 X 298 11 1.557 .', Ke = 4.746