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) + 2OH(aq), O (g) + 4 H (aq) + 4e E = -0.42 V at pH = 7 2 HO (1), E = +0.82 V at pH = 7 When a ruthenium chloride solution was electrolyzed for 500 s with a 120-mA current, 31.0 mg of ruthenium was deposited. What is the oxidation number of ruthenium in the ruthenium chloride? 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) + 4 e 2 HO (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7

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