We have seen that complex formation can stabilize oxidation states An important illustration of this fact is the oxidation of water in acidic solutions by Co 3 (aq) but not by Co(en) 3 3 Use the following data Show that Co(en) 3 3 is stable in water but Co 3 (aq) is not Co(H0)6 e Co (HO)6 2 3 en Co(H2O) 3 3en Co(H,O) 2 E 1 82 V Co(en)3 2 6H0(1) log B3 12 18 Co(en)3 3 6H,O(1) log B3 47 30 Calculate E for the reaction Co(en)3 e Co(en)3

Question: We have seen that complex formation can stabilize oxidation states. An important illustration of this fact is the oxidation of water in acidic solutions by

We have seen that complex formation can stabilize oxidation states. An important illustration of this fact is the oxidation of water in acidic solutions by Co³⁺(aq) but not by [Co(en)₃]³⁺. Use the following data.

[Co(HO)6]+ + e [Co(HO)6]2+ + 3 en [Co(HO)6]3+ + 3 en [Co(H,O)%]2+ Calculate E for the reaction [Co(en)3]+ + e

Show that [Co(en)₃]³⁺ is stable in water but Co³⁺(aq) is not.

[Co(H0)6]+ + e [Co (HO)6]2+ + 3 en [Co(H2O)%]3+ + 3en [Co(H,O)%]2+ E = 1.82 V [Co(en)3]2+ + 6H0(1) log B3 = 12.18 [Co(en)3]3+ +6H,O(1) log B3 = 47.30 Calculate E for the reaction [Co(en)3]+ + e [Co(en)3]+

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