submission until Apr , 5 at 8 AM CDT is allowed, with a one time 10% penalty to

Question

submission until Apr , 5 at 8 AM CDT is allowed, with a one time 10% penalty to submitted score. Standard Reduction Potentials (Volts) at 25 °C 2 e-? 2 Cl (aq) C12 (g) 1.360 02g)+4 H,o a e6 H200) 1.229 2 H2o) teHg 2 OH ap 0.828 0.280 Co (a) 2 eCo (s) A 0.162 M neutral aqueous CoClz solution is electrolyzed under 1 atm pressure using plat?num electrodes (a) Write the half-reactions expected to occur, taking into account the effect of the non-standard conditions on the electrode potentials Half reaction at anode Half-reaction at cathode (b) What is the expected decomposition potential? 3. Electrolysis of Aqueous Solution - Predict Reactions: This is group attempt 1 of 5

Explanation / Answer

CoCl2 (aq)---------------> Co^2+(aq) + 2Cl^- (aq)

half reaction at anode

   2Cl^- (aq) -----------------------> Cl2 + 2e^-        E0 = -1.36v

half reaction at cathode

   Co^2+ (aq) + 2e^- ---------------> Co(s)          E0 = -0.28v

2Cl^- (aq) -----------------------> Cl2 + 2e^-        E0 = -1.36v

Co^2+ (aq) + 2e^- ---------------> Co(s)          E0 = -0.28v

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2Cl^- (aq) + Co^2+ (aq) ---------------> Cl2(g) + Co(s)    E0cell = -1.64v

The decomposition potential = -1.64v

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