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Electrode potentials and electrochemical cells (A-level only)

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Question 1

The theoretical EMF of a direct ethanol fuel cell operating under acidic conditions is +1.15 V.

The standard electrode potential for one of the electrodes in this cell is:

2CO2(g)+12H+(aq)+12e−→CH3CH2OH(aq)+3H2O(l)E⊖=+0.08 V 2\text{CO}_2\text{(g)} + 12\text{H}^+\text{(aq)} + 12\text{e}^- \rightarrow \text{CH}_3\text{CH}_2\text{OH(aq)} + 3\text{H}_2\text{O(l)} \quad E^\ominus = +0.08\text{ V} 2CO2​(g)+12H+(aq)+12e−→CH3​CH2​OH(aq)+3H2​O(l)E⊖=+0.08 V

Give the half-equation for the other electrode and calculate its standard electrode potential.

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Electrode potentials and electrochemical cells (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Electrode potentials and electrochemical cells (A-level only)