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2. Two half-reactions of an electrochemical cell are given below :MnO – 4 (aq) + 8H + (aq) + 5e – → Mn 2+ (aq) + 4H 2 O (I) , E° = 1.51 VSn 2+ (aq) → Sn 4+ (aq) + 2e – , E° = + 0.15 V.Construct the redox reaction equation from the two half-reactions and calculatethe cell potential from the standard potentials and predict if the reaction isreactant or product favoured. |
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Answer» 2. Two half-reactions of an electrochemical cell are given below : MnO – 4 (aq) + 8H + (aq) + 5e – → Mn 2+ (aq) + 4H 2 O (I) , E° = 1.51 V Sn 2+ (aq) → Sn 4+ (aq) + 2e – , E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. |
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