CHMB16H3 Lecture Notes - Lecture 9: Liquid Junction Potential, Standard Electrode Potential, Phase Boundary

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14 Oct 2012
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Oxidation and reduction reaction (redox reactions: oxidation/reduction reactions involve the transfer of electrons and a change in oxidation state, a reducing age (reductant) is an electron donor, an oxidizing agent (oxidant) is an electron acceptor. Balance the oxygen atoms for each half-reaction by adding h2o step 6. Balance the hydrogen atoms foe each half-reaction *now both half-reactions should be balanced! +2 +7 +3 +2 10 balancing redox reactions step 7. Multiply and add each half reaction together to get the net equation +2 +7 +3 +2 balanced! K+ ions flowing out of the salt bridge at the cathode. Redox reactions in an electrochemical cell: ecell can be measured using a voltmeter connected between the 2 electrodes of the cell. 23 electrode potentials e - anode cathode e - o as a result, the measured potential is not an absolute half cell potential but instead the difference between the 2 absolute half cell potentials.

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