Question: For the exercise in this topic, base your answers on the potentials listed in Table 6M.1 or Appendix 2B, with the exception of the reduction

For the exercise in this topic, base your answers on the potentials listed in Table 6M.1 or Appendix 2B, with the exception of the reduction and oxidation of water at pH = 7: 2 HO(1) + 2 e H(g) + 2 OH (aq), E = O(g) + 4H+ (aq) + 4e 2 HO (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7 A sample of manganese of mass 4.9 g was produced from a manganese nitrate aqueous solution when a current of 350 mA was passed for 13.7h. What is the oxidation number of manganese in the manganese nitrate? TABLE 6M.1 Standard Potentials at 25 C* Species Oxidized form is strongly oxidizing F/F Aut/Au Ce*+/Ce+ MnO

2 HO (1) + 2 e H(g) + 2 OH (aq), E = O(g) + 4 H+ (aq) + 4e 2 HO (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7

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