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Write the half reaction for the reduction of cobalt (II) ions

Write the half reaction for the reduction of cobalt (II) ions What is the standard reduction potential for this ½ reaction?. Write the half reaction for the reduction of cobalt (II) ions Co 2+ + 2e -  Co (s) What is the standard reduction potential for this ½ reaction? -0.28 V.

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Write the half reaction for the reduction of cobalt (II) ions

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  1. Write the half reaction for the reduction of cobalt (II) ions What is the standard reduction potential for this ½ reaction?

  2. Write the half reaction for the reduction of cobalt (II) ions Co2+ + 2e- Co (s) What is the standard reduction potential for this ½ reaction? -0.28 V

  3. Write the ½ reaction for the reduction of aluminum. What is the reduction potential for this ½ reaction?

  4. Write the ½ reaction for the reduction of aluminum. Al3+ + 3 e- Al (s) What is the reduction potential for this ½ reaction? -1.66 V

  5. In a Co / Al battery, what ½ reaction is likely to be taking place at the cathode. [hint: what combination of ½ reactions will yield a positive voltage?] What ½ reaction is taking place at the anode?

  6. In a Co / Al battery, what ½ reaction is likely to be taking place at the cathode. [hint: what combination of ½ reactions will yield a positive voltage?] Co2+ + 2 e- Co (s) What ½ reaction is taking place at the anode? Al (s)  Al3+ + 3 e-

  7. Write a balanced redox equation for this reaction.

  8. 3 Co2+ + 2 Al  3 Co + 2 Al3+

  9. What is the voltage of this electrochemical cell (battery)? E Cell = -0.28 V – (-1.66 V) = 1.38 V

  10. Will each of these reactions be spontaneous? If it is, balance it and determine the E° Cell. Cu + Ag+  Cu2+ + Ag I2 + Au  2 I- + Au3+ K + Li+  Li + K+ Fe2+ + Mg  Fe + Mg2+

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