What conditions must be met to measure the standard electrode potential of the Fe3+/Fe2+ electrode?

To measure the standard electrode potential of the Fe3+/Fe2+ electrode, specific reference conditions are established, which include temperature and pressure. The standard electrode potential is a measure taken under standard conditions, typically defined as a temperature of 298 Kelvin (25°C) and a pressure of 100 kPa (1 atm). These conditions provide a uniform basis for comparison between different electrode potentials.

The associated values (temperature and pressure) are critical because they ensure that external factors do not influence the measurements of electrode potentials. The choice that states a temperature of 298K and a pressure of 100 kPa accurately aligns with these standard conditions, allowing for consistent and replicable measurement of the electrode potential in electrochemical cells. Thus, it is the most appropriate choice among the options provided.