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when two half...

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when two half cells of electrode potential of E1 and E2 are combined to form a cell of electrode potential E3 ,then (when n1 ,n2 and n3 are no. of electrons exchanged in first ,second and combined half cells)

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Q. When two half cells of electrode potential

E_{1}

E_{2}

combine to form a cell of electrode potential

E_{3}

then choose the correct relation :
Here

n_{1}, n_{2} & n_{3} are no. of electrons exhanged in first, second and combined half cells

Q. Prove that for two half reactions having potentials

E_{1}

E_{2}

which are combined to yield a third half reaction, having a potential

E_{3}

,

E_{3} = \frac{n_{1} E_{1} + n_{2} E_{2}}{n_{3}}

.

Q. The standard electrode potential of two half cells are given below-

N i^{+ 2} + 2 e^{-} ⟶ N i; E^{0} = - 0.25 V

Z n^{+ 2} + 2 e^{-} ⟶ Z n; E^{0} = - 0.77 V

The voltage cell formed by combining the two half cell would be:

Q. When two half cells X and Y combined then the standard cell potential of cell is.

Q. The standard electrode potential of the half cells are given below -

Z n^{2 +} + 2 e^{-} \to Z n; E_{1} = - 7.62 V

F e^{2 +} + 2 e^{-} \to F e; E_{2} = - 7.81 V

The emf of the cell,

F e^{2 +} + Z n \to Z n^{2 +} + F e

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