Two half cell reactions of an electrochemical cell are given below:

MnO (aq ) +8H+ (aq ) + 5e Mn2+ (aq) + 4H2 O( l), E 1.51V Sn 2+(aq) +Sn 4+(aq) + 2e , E0 =0.15 VConstruct the redox equation from the two half cell reactions and predict if this reaction favours formation of reactants or product shown in the equation.

Ecell0 = Ered0    + Eoxi0           = 0.15 + 0.15           = 0.30 V

Since, Ecell0  is positive, the reaction will take place in forward direction. Thus, the reaction favours formation of products.

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