Chem 30A F 01 The Daniell Cell a type of Galvanic Electrochemical Cell salt b r id g e Zn s Cu s E U L B 1 M Zn2 1 M SO 42 1 M Cu2 1 M SO 42 process at electrode oxidation reduction electrode label anode cathode E 0 76 0 76 0 34 half cell notation Zn s Zn2 aq Cu2 aq Cu s half reaction cell diagram Zn s Zn2 aq Cu2 aq Cu s net reaction net cell potential E 0 76 0 34 1 10 V relative to S H E Notes on standard reduction potentials Table C 21 p A100 101 in Munowitz s Principles of Chemistry contains standard reduction potentials E values for many substances Similar tables can be found in any General Chemistry texts as well as the Handbook of Chemiistry and Physics available at UCLA on the internet By convention the reduction potentials are relative to the reduction of hydrogen 2H aq 2e H2 g at 0 V S H E standard hydrogen electrode The data in this table are typical of those found in chemistry references in that they are the values obtained for reactants at 1 M concentration or 1 atm pressure and 25 C Note that tables found in biochemistry texts are similar but that when H or OH are reactants the Chem 30A F 01 standard reference condition is pH 7 not 1 M for these species Physiology texts typically contain data obtained at 37 C rather than at room temperature
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