PowerPoint Presentationhome.cc.umanitoba.ca/~perreau/Chem3590_2018/Nov. 28...Pt, Au, Pd, C are inert...
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Transcript of PowerPoint Presentationhome.cc.umanitoba.ca/~perreau/Chem3590_2018/Nov. 28...Pt, Au, Pd, C are inert...
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Standard Electrode Potential of a Half-Reaction, Eo
Definition: Potential of a cell composed of a workingelectrode (1 M cation activity) as the cathode and SHE as the anode.
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V
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SCE[Zn2+]=xMZn(s)
SHE[Ag+]=xMAg(s)
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SCEHE system
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1. Calculate Eo for the reaction:
2Na(s) + ClO4- + H2O → 2Na+ + ClO3
- + 2OH-
a) +2.88 V b) +2.54 V c) -2.54 V d) -5.59 V e) - 2.88 V
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2. From the following data, determine which system was used for potentiometric analysis. For SCE Eref = 0.244 V.
•Mg2+|Mg(s)||SHE•Al3+|Al(s)||SCE•Cu2+|Cu(s) ||SCE•Fe3+|Fe(s)||SHE•Ag+|Ag(s)||SHE