Pt(s)/ IO3- (aq),H+(aq) // Zn^2+(aq)/ Zn(s)
chemical equation for anode and cathode
Anode (oxidation half-reaction): Zn(s) -> Zn^2+(aq) + 2e^-
Cathode (reduction half-reaction): 2H+(aq) + 2e^- -> H2(g)
Overall cell reaction: Zn(s) + 2H+(aq) + IO3-(aq) -> Zn^2+(aq) + H2(g) + I-(aq)