Consider the following standard electrode potentials:
\( Zn^{2+}(aq) + 2e^- \rightleftharpoons Zn(s) \), \( E^{\ominus} = -0.76 \, V \)
\( Fe^{2+}(aq) + 2e^- \rightleftharpoons Fe(s) \), \( E^{\ominus} = -0.45 \, V \)
\( Ni^{2+}(aq) + 2e^- \rightleftharpoons Ni(s) \), \( E^{\ominus} = -0.26 \, V \)
Which species will react with each other spontaneously under standard conditions?