Question

Write the Nernst equation for a cell having the cell reaction. 

\[\ce{aA + bB -> cC + dD}\].

A galvanic cell involves the following cell reaction.

\[\ce{aA + bB -> cC + dD}\]

If the cell reaction involves a transfer of n electrons, write the Nernst equation for the cell.

Apply Nernst equation to the following general cell reaction.

\[\ce{aA + bB -> cC + dD}\], involving a transfer of n electrons.

Answer 1

For a galvanic cell involving the cell reaction

\[\ce{aA + bB -> cC + dD}\]

The Nernst equation can be written as follows.

\[\ce{E_{cell} = E{^{\circ}_{cell}} - \frac{RT}{nF} log_e \frac{[C]^c[D]^d}{[A]^a[B]^b}}\]

At T = 298 K (25°C), we have

\[\ce{E_{cell} = E{^{\circ}_{cell}} - \frac{0.0591}{n} log_e \frac{[C]^c[D]^d}{[A]^a[B]^b}}\]