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Calculate E degree for each of the following reactions, and tell which are spontaneous under standard-state conditions: (a) 2 Fe^2+(aq) + Pb^2+(aq) rightarrow 2 Fe^3+(aq) + Pb(s) (b) Mg(s) + Ni^2+(aq) rightarrow Mg^2+(aq) + Ni(s) Standard Reduction Potentials at 25 degree C F_2(g) + 2e^- rightarrow 2 F^-(aq) +2.87 Fe^2+(aq) + 2e^- rightarrow Fe(s) -0.440 Fe^3+(aq) + e^- rightarrow Fe^2+(aq) +0.771 Fe(CN)^3-_6 (aq) + e^- rightarrow Fe(CN)^4-_6 (aq) +0.36 Mg^2+(aq) + 2 e^- rightarrow Mg(s) -2.37 Mn^2+(aq) + 2 e^- rightarrow Mn(s) -1.18 MnO_2(s) + 4 H^+(aq) + 2e^- rightarrow Mn^2+(aq) + 2 H_2O(l) +1.23 Na^+(aq) + e^- rightarrow Na(s) -2.71 Ni^2+(aq) +2e^- rightarrow Ni(s) -0.28 Pb^2+(aq) + 2e^- rightarrow Pb(s) -0.126
Calculate E degree for each of the following reactions, and tell which are spontaneous under standard-state conditions: (a) 2 Fe^2+(aq) + Pb^2+(aq) rightarrow 2 Fe^3+(aq) + Pb(s) (b) Mg(s) + Ni^2+(aq) rightarrow Mg^2+(aq) + Ni(s) Standard Reduction Potentials at 25 degree C F_2(g) + 2e^- rightarrow 2 F^-(aq) +2.87 Fe^2+(aq) + 2e^- rightarrow Fe(s) -0.440 Fe^3+(aq) + e^- rightarrow Fe^2+(aq) +0.771 Fe(CN)^3-_6 (aq) + e^- rightarrow Fe(CN)^4-_6 (aq) +0.36 Mg^2+(aq) + 2 e^- rightarrow Mg(s) -2.37 Mn^2+(aq) + 2 e^- rightarrow Mn(s) -1.18 MnO_2(s) + 4 H^+(aq) + 2e^- rightarrow Mn^2+(aq) + 2 H_2O(l) +1.23 Na^+(aq) + e^- rightarrow Na(s) -2.71 Ni^2+(aq) +2e^- rightarrow Ni(s) -0.28 Pb^2+(aq) + 2e^- rightarrow Pb(s) -0.126
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Elin HesselLv2
31 Mar 2019
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