Calculate the equilibrium constant at 25 °C for the reaction . See Appendix D for standard reduction potentials.

The equilibrium constant (K) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a given chemical reaction. It is temperature-dependent and provides insight into the extent of a reaction; a large K indicates a reaction that favors products, while a small K suggests a preference for reactants.

Standard reduction potentials are measured voltages that indicate the tendency of a chemical species to gain electrons and be reduced. These values are typically referenced against the standard hydrogen electrode and are crucial for calculating the overall cell potential in electrochemical reactions, which can be related to the equilibrium constant.

The Nernst equation relates the cell potential of an electrochemical reaction to the concentrations of the reactants and products. It allows for the calculation of the equilibrium constant from the standard cell potential, incorporating temperature and the number of electrons transferred in the reaction, thus linking thermodynamics and kinetics.