fluorine gas (F ) has the maximum tendency to get reduced to fluoride ions (F – ) and therefore fluorine gas is the strongest oxidising agent and fluoride ion is the weakest reducing agent. Lithium has the lowest electrode potential indicating that lithium ion is the weakest oxidising agent while lithium metal is the most powerful reducing agent in an aqueous solution. It may be seen that as we go from top to bottom in Table . the standard electrode potential decreases and with this, decreases the oxidising power of the species on the left and increases the reducing power of the species on the right hand side of the reaction.
Electrochemical cells are extensively used for determining the pH of solutions, solubility product, equilibrium constant and other thermodynamic properties and for potentiometric titrations. . How would you determine the standard electrode potential of the system Mg + |Mg? .
Can you store copper sulphate solutions in a zinc pot? . Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions.