Reduction Potentials

Below are some Standard Electrode Potentials for \(1.0\c\molar\) Aqueous Solutions at \(25\unit{\degreeCelsius}\)

It is organized with the Standard Potential E° (volts) on the left and the Cathode (Reduction) Half-Reaction on the right, sorted by standard potential.

\(-3.04\>\>\>\>=\>\>\>\>\eLi^+_{(aq)} + e^- \to \eLi_{(s)}\)
\(-2.92\>\>\>\>=\>\>\>\>\eK^+_{(aq)} + e^- \to \eK_{(s)}\)
\(-2.76\>\>\>\>=\>\>\>\>\eCa^{2+}_{(aq)} + 2e^- \to \eCa_{(s)}\)
\(-2.71\>\>\>\>=\>\>\>\>\eNa^+_{(aq)} + e^- \to \eNa_{(s)}\)
\(-2.38\>\>\>\>=\>\>\>\>\eMg^{2+}_{(aq)} + 2e^- \to \eMg_{(s)}\)
\(-1.66\>\>\>\>=\>\>\>\>\eAl^{3+}_{(aq)} + 3e^- \to \eAl_{(s)}\)
\(-0.83\>\>\>\>=\>\>\>\>2\eH_2\eO_{(l)} + 2e^- \to \eH_{2(g)} + 2\eO\eH^-_{(aq)}\)
\(-0.76\>\>\>\>=\>\>\>\>\eZn^{2+}_{(aq)} + 2e^- \to \eZn_{(s)}\)
\(-0.74\>\>\>\>=\>\>\>\>\eCr^{3+}_{(aq)} + 3e^- \to \eCr_{(s)}\)
\(-0.41\>\>\>\>=\>\>\>\>\eFe^{2+}_{(aq)} + 2e^- \to \eFe_{(s)}\)
\(-0.40\>\>\>\>=\>\>\>\>\eCd^{2+}_{(aq)} + 2e^- \to \eCd_{(s)}\)
\(-0.23\>\>\>\>=\>\>\>\>\eNi^{2+}_{(aq)} + 2e^- \to \eNi_{(s)}\)
\(-0.14\>\>\>\>=\>\>\>\>\eSn^{2+}_{(aq)} + 2e^- \to \eSn_{(s)}\)
\(-0.13\>\>\>\>=\>\>\>\>\ePb^{2+}_{(aq)} + 2e \to \ePb_{(s)}\)
\(-0.04\>\>\>\>=\>\>\>\>\eFe^{3+}_{(aq)} + 3e^- \to \eFe_{(s)}\)
\(+0.00\>\>\>\>=\>\>\>\>2\eH^+_{(aq)} + 2e^- \to \eH_{2(g)}\)
\(+0.15\>\>\>\>=\>\>\>\>\eSn^{4+}_{(aq)} + 2e^- \to \eSn^{2+}_{(aq)}\)
\(+0.16\>\>\>\>=\>\>\>\>\eCu^{2+}_{(aq)} + e^- \to\eCu^+_{(aq)}\)
\(+0.17\>\>\>\>=\>\>\>\>\eCl\eO^-_{4(aq)} + \eH_2\eO_{(l)} + 2e^- \to \eCl\eO^-_{3(aq)} + 2\eO\eH^-_{(aq)}\)
\(+0.22\>\>\>\>=\>\>\>\>\eAg\eCl(s) + e^- \to \eAg(s) + \eCl^-_{(aq)}\)
\(+0.34\>\>\>\>=\>\>\>\>\eCu^{2+}_{(aq)} + 2e^- \to \eCu_{(s)}\)
\(+0.35\>\>\>\>=\>\>\>\>\eCl\eO^-_{3(aq)} + \eH_2\eO_{(l)} + 2e^- \to \eCl\eO^-_{2(aq)} + 2\eO\eH^-_{(aq)}\)
\(+0.49\>\>\>\>=\>\>\>\>\eI\eO^-_{(aq)} + \eH_2\eO_{(l)} + 2e^- \to \eI^-_{(aq)} + 2\eO\eH^-_{(aq)}\)
\(+0.52\>\>\>\>=\>\>\>\>\eCu^+_{(aq)} + e^- \to \eCu_{(s)}\)
\(+0.54\>\>\>\>=\>\>\>\>\eI_{2(s)} + 2e^- \to 2\eI^-_{(aq)}\)
\(+0.59\>\>\>\>=\>\>\>\>\eCl\eO2^-_{(aq)} + \eH_2\eO_{(l)} + 2e^- \to \eCl\eO^-_{(aq)} + 2\eO\eH^-_{(aq)}\)
\(+0.77\>\>\>\>=\>\>\>\>\eFe^{3+}_{(aq)} + e^- \to \eFe^{2+}_{(aq)}\)
\(+0.80\>\>\>\>=\>\>\>\>\eHg^{2+}_{2(aq)} + 2e^- \to 2\eHg_{(l)}\)
\(+0.80\>\>\>\>=\>\>\>\>\eAg^+_{(aq)} + e^- \to \eAg_{(s)}\)
\(+0.85\>\>\>\>=\>\>\>\>\eHg^{2+}_{(aq)} + 2e^- \to \eHg_{(l)}\)
\(+0.90\>\>\>\>=\>\>\>\>\eCl\eO^-_{(aq)} + \eH_2\eO_{(l)} + 2e^- \to \eCl^-_{(aq)} + 2\eO\eH^-_{(aq)}\)
\(+0.90\>\>\>\>=\>\>\>\>2\eHg^{2+}_{(aq)} + 2e^- \to \eHg^{2+}_{2(aq)}\)
\(+0.96\>\>\>\>=\>\>\>\>\eN\eO^-_{3(aq)} + 4\eH^+_{(aq)} + 3e^- \to \eN\eO(g) + 2\eH_2\eO_{(l)}\)
\(+1.07\>\>\>\>=\>\>\>\>\eBr2_{(l)} + 2e^- \to 2\eBr^-_{(aq)}\)
\(+1.23\>\>\>\>=\>\>\>\>\eO_{2(g)} + 4\eH^+_{(aq)} + 4e^- \to 2\eH_2\eO_{(l)}\)
\(+1.23\>\>\>\>=\>\>\>\>\eMn\eO_{2(g)} + 4\eH^+_{(aq)} + 2e^- \to \eMn^{2+} + 2\eH_2\eO_{(l)}\)
\(+1.33\>\>\>\>=\>\>\>\>\eCr_2\eO^{2-}_{7(aq)} + 14\eH^+_{(aq)} + 6e- \to 2\eCr^{3+}_{(aq)} + 7\eH_2\eO_{(l)}\)
\(+1.36\>\>\>\>=\>\>\>\>\eCl_{2(g)} + 2e^- \to 2\eCl^-_{(aq)}\)
\(+1.44\>\>\>\>=\>\>\>\>\eCe^{4+}_{(aq)} + e^- \to \eCe^{3+}_{(aq)}\)
\(+1.49\>\>\>\>=\>\>\>\>\eMn\eO^-_{4(aq)} + 8\eH^+_{(aq)} + 5e^- \to \eMn^{2+}_{(aq)} + 4\eH_2\eO_{(l)}\)
\(+1.78\>\>\>\>=\>\>\>\>\eH_2\eO_{2(aq)} + 2\eH^+_{(aq)} + 2e^- \to 2\eH_2\eO_{(l)}\)
\(+1.82\>\>\>\>=\>\>\>\>\eCo^{3+}_{(aq)} + e^- \to \eCo^{2+}_{(aq)}\)
\(+2.01\>\>\>\>=\>\>\>\>\eS_2\eO^{2-}_{8(aq)} + 2e^- \to {2\eS\eO_4}^{2-}_{(aq)}\)
\(+2.07\>\>\>\>=\>\>\>\>{\eO_3}_{(g)} + 2\eH^+_{(aq)} + 2e^- \to \eO_{2(g)} + \eH_2\eO_{(l)}\)
\(+2.87\>\>\>\>=\>\>\>\>\eF_2(g) + 2e^- \to 2\eF^-_{(aq)}\)