If E⁰₁, E⁰₂ and E⁰₃ are the standard electrode potentials for \(Fe/{ Fe }^{ 2+ },{ Fe }^{ 2+ }/{ Fe }^{ 3+ }\) and \(Fe/{ Fe }^{ 3+ }\) electrodes respectively, derive a relation between E⁰₁, E⁰₂ and E⁰₃.

The following electrochemical cell has been set up
\(Pt(1)|{ Fe }^{ 3+ },{ Fe }^{ 2+ }(a=1)|{ Ce }^{ 4+ },{ Ce }^{ 3+ }(a=1)|Pt(2)\)
\({ E }^{ 0 }\left( { Fe }^{ 3+ }/{ Fe }^{ 2+ } \right) =0.77V;{ E }^{ 0 }\left( { Ce }^{ 4+ }/{ Ce }^{ 3+ } \right) =1.61V\)
If an ammeter is connected between the two platinum electrodes, predict the direction of flow of current. Will the current increase or decrease with time ?

Tarnished silver contains Ag₂ S. Can this tarnish be removed by placing tarnished silver ware in an aluminium pan containing an inert electrolytic solution such as NaCl ? The standard electrode potential for the half reactions are : For \({ Ag }_{ 2 }S(s)+{ 2e }^{ - }\longrightarrow 2Ag(s)+{ S }^{ 2- },\) it is - 0.71 V and for \({ Al }^{ 3+ }+{ 3e }^{ - }\longrightarrow Al(s)\), it is - 1.66 V

Three iron sheets have been coated separately with three metals (A, B and C) whose standard electrode potentials are given below :

Identify in which case rusting will take place faster when coating is damaged.

Calculate the standard electrode potential of Cu⁺/Cu half cell. Given that the standard reduction potentials of Cu²⁺/Cu and Cu²⁺/Cu⁺ are 0.337 V and 0.153 V respectively.