Given that the standard electrode` (E^(@))` of metals are :
`K^(+)//K=- 2.93 V, Ag^(+)//Ag = 0.80 V, Cu^(2+)//Cu = 0. 34 V, `
` Mg^(2+)//Mg =- 2.37 V, Cr^(3+)// Cr =- 0.74 V, Fe^(2+)//Fe =- 0.44 V`.
Arrange these metals in an increasing order of their reducing power.
Or
Two half -reactions of an electrochemical cell are given below :
`MnObar(4)(aq) + 8 H^(+) (aq) + 5 e^(-) to Mn^(2+) (aq) + 4 H_(2) O (l) , E^(@) = + 1.51 V,`
` Sn^(2+) (aq) to Sn^(4+) (aq) + 2e^(-) , E^(@) = + 0.15^(V)` constructredox equation and predict if the rech on is rectant or product favoured.