亜セレン酸
H 2 SeO 3 ( aq ) + 4 H + ( aq ) + 4 e − = Se ( s ) + 3 H 2 O ( l ) {\displaystyle {\ce {H2SeO3(aq)\ +4H^{+}(aq)\ +4{\mathit {e}}^{-}=\ Se(s)\ +3H2O(l)}}} , E ∘ = 0.739 V {\displaystyle E^{\circ }=0.739{\rm {V}}}
HSeO 4 − ( aq ) + 3 H + ( aq ) + 2 e − = H 2 SeO 3 ( aq ) + H 2 O ( l ) {\displaystyle {\ce {HSeO4^{-}(aq)\ +3H^{+}(aq)\ +2{\mathit {e}}^{-}=\ H2SeO3(aq)\ +H2O(l)}}} , E ∘ = 1.094 V {\displaystyle E^{\circ }=1.094{\rm {V}}}