Question: Refer to Example 23-2. Select a reducing agent (from Table 23.1 or Appendix D) that will reduce VO 2+ to V 3+ and no further

Refer to Example 23-2. Select a reducing agent (from Table 23.1 or Appendix D) that will reduce VO²⁺ to V³⁺ and no further in acidic solution.

Example 23-2

Can MnO₄^–(aq) be used to oxidize VO²⁺(aq) to VO₂⁺(aq) for standard-state conditions in an acidic solution? If so, write a balanced equation for the redox reaction.

Table 23.1

TABLE 23.1 Selected Properties of Elements of the First Transition Series Atomic number Electron config.a

TABLE 23.1 Selected Properties of Elements of the First Transition Series Atomic number Electron config.a Metallic radius, pm Ioniz. energy, kJ mol-1 First Second Third E,Vb Common positive oxidation states Sc Ti V 21 22 3d4s 3d4s 161 145 3 1397 3.00 mp, C Density, g cm-3 Hardnessd Electrical conductivity 3 23 3d4s 132 631 658 650 653 717 1235 1414 1592 1509 1310 2389 2653 2828 2987 3248 -2.03 -1.63 -1.13 -0.90 -1.18 2,3,4 2,3,4,5 1672 1710 4.50 6.11 4 Cr 24 3d4s 125 6 Mn 25 3d54s 124 Fe Co 26 27 3d64s 3d74s 124 125 Ni 28 3d84s 125 759 758 737 745 906 1646 1753 1958 1733 1561 2957 3232 3393 3554 3833 -0.440 -0.277 -0.257 +0.340 -0.763 2,3,6 2,3,4,7 2,3,6 2,3 2,3 1900 1244 1530 1495 1455 7.14 7.43 7.87 8.90 8.91 9.0 5.0 4.5 12 1 16 25 - Cu Zn 29 30 3d04s 3d04s 128 133 23 1,2 1083 8.95 2.8 93 2 420 7.14 2.5 27

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