Use the References to access important values if needed for this questlon Enter

Question

Use the References to access important values if needed for this questlon Enter electrons as e Use smallest possible integer coefficients. States are not required. If a box is not needed, leave it blank. Standard Reduction Potentials (Volts) at 25 °C 1.360 02(8)+4 H,oa)+46 H,001.229 2 H200)+2e+2O(aq) 0.828 -1.180 Ch (g)+2e2 Cr (aq) Mn2 (aq) + Mn (s) A 0.101 M neutral aqueous MaCly solution is electrolyzed under I atm pressure using platinum electrodes. (n) Write the half-reactions expected to occur, taking into account the effect of the non-standard conditions on the electrode Half-reaction at anode

Explanation / Answer

MnCl2 (aq) -----------------> Mn^2+ (aq) + 2Cl^- (aq)

half reaction at anode

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

Half reaction at cathode

Mn^2+ (aq) + 2e^- ----------------> Mn                      E0 = -1.18v

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

Mn^2+ (aq) + 2e^- ----------------> Mn                      E0 = -1.18v

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2Cl^- (aq) + Mn^2+ (aq) ---------------> Mn(s) + Cl2(g)    E0 cell = -2.54v

decomposition potential = -2.54v

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