Question

How many of the following are the CORRECT expressions to calculate e.m.f. of the cell?
i. $E_{\text{cell }}=E_{\text{oxi }}$ (anode) $+E_{\text{red }}$ (cathode)
ii. $E_{\text{cell }}=E_{\text{red }}$ (anode) $-E_{\text{red }}$ (cathode)
iii. $E_{\text{cell }}=E_{\text{oxi }}$ (anode) $-E_{\text{oxi }}$ (cathode)
iv. $E_{\text{cell }}=E_{\text{red }}$ (cathode) $-E_{\text{red }}$ (anode)
v. $E_{\text{cell }}=E_{\text{red }}$ (cathode) $+E_{\text{red }}$ (anode)
vi. $E_{\text{cell }}=E_{\text{oxi }}$ (anode) $+E_{\text{oxi }}$ (cathode)

Answer 1

Answer: 3

Expressions $(i),(iii)$ and $(iv)$ are the correct expressions to calculate e.m.f. of the cell.