Use the data in Appendix 2B to calculate E°(U⁴⁺/U).

2B STANDARD POTENTIALS AT 25 C Potentials in Electrochemical Order Reduction half-reaction Strongly oxidizing H4XeO6 + 2 H+ 2 e XeO3 + 3 HO F+2 e 2 FT 03 + 2 H+ + 2 e O + HO SO8 +2e 2 SO4 Ag+ + e Ag+ CO+ +eCo+ HO2 + 2 H+2 e 2 HO Aut + e Au Pb+ + 2e Pb+ 2 HCIO + 2 H+2 e Cl + 2 HO Cete Ce+ 2 HBrO + 2 H+ + 2 e MnO4 + 8 H+ + 5e Mn+ + e Mn+ Au+ + 3 e Au Cl + 2 e 2 Cl CrO7- + 14 H+ + 6 e 2 Cr+ + 7 HO Br + 2 HO Mn+ + 4 HO O3 + HO + 2e O+ 2 OH O + 4H+ + 4e 2 HO MnO + 4H+ + 2e Mn+ + 2 HO E/V +3.0 +2.87 +2.07 +2.05 +1.98 +1.81 +1.78 +1.69 +1.67 +1.63 +1.61 +1.60 1.51 +1.51 +1.40 +1.36 +1.33 +1.24 +1.23 +1.23 Reduction half-reaction NO3 + HO +2 e NO + 2 OH Ti + e Ti+ 2 H+2e H Fe+ + 3 e Fe O + HO + 2 e HO + OH Pb+ + 2 e Pb In + e In Sn+ + 2 e Sn Agle Ag + I Ni+ + 2 e Ni V+ + eV+ Co+ + 2e Co In+ + 3 e In Tl TIe PbSO4 + 2 e Pb + SO4- Ti++eTi+ In+ + e Int Cd+ + 2 e Cr+ + Cr+ Fe+ + 2 e Fe Cd E/V +0.01 0.00 0, by definition -0.04 -0.08 -0.13 -0.14 -0.14 -0.15 -0.23 -0.26 -0.28 -0.34 -0.34 -0.36 -0.37 -0.40 -0.40 -0.41 -0.44