The half-cells Fe²⁺(aq) | Fe(s) and O₂(g) | H₂O (in acid solution) are linked to create a voltaic cell.
(a) Write equations for the oxidation and reduction half-reactions and for the overall (cell) reaction.
(b) Which half-reaction occurs in the anode compartment, and which occurs in the cathode compartment?
(c) Complete the following sentences: Electrons in the external circuit flow from the_______ electrode to the_______ electrode. Negative ions move in the salt bridge from the _______half-cell _______to the half-cell.