First slide

Standard EMF of a cell

Question

EMF of a cell in terms of reduction potential of its left and right electrodes is

Easy

A

$\large E\, = \,{E_{left}} - {E_{right}}$
B

$E\, = \,{E_{left}} + {E_{right}}$
C

$E\, = \,{E_{right}} - {E_{left}}$
D

$E\, = \, - ({E_{right}} + {E_{left}})$

Solution

Left hand electrode is anode.
Right hand electrode is cathode.
E_cell = E_c- E_a = E_right - E_left

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