What does the term standard electrode potential, SEP, mean?
Draw a fully labelled diagram of the apparatus that could be used to measure the SEP of the $\text{Fe}^{3+}/\text{Fe}^{2+}$ electrode.
The reaction of $\text{Fe}^{3+}$ ions with $\text{I}^-$ ions is an equilibrium reaction.
Using the Data Booklet, Calculate the $E^{\theta}_{\text{cell}}$ for this reaction: $2\text{Fe}^{3+}\text{(aq)} + 2\text{I}^-\text{(aq)} \rightleftharpoons 2\text{Fe}^{2+}\text{(aq)} + \text{I}_2\text{(aq)}$.
Hence state, with a reason, whether equilibrium will contain more products or more reactants.
Write the expression for $K_c$ for this reaction, and give its units.
Use these data, together with the equation given in (c), to work out the equilibrium concentrations of $\text{Fe}^{2+}\text{(aq)}$ and $\text{I}^-\text{(aq)}$. The equilibrium concentrations were $[\text{Fe}^{3+}\text{(aq)}] = 2.0 \times 10^{-4}\ \text{mol dm}^{-3}$ and $[\text{I}_2\text{(aq)}] = 1.0 \times 10^{-2}\ \text{mol dm}^{-3}$.
Calculate the $K_c$ value for this reaction.