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半電池の起電力発生のメカニズム : pHと起電力


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Title: 半電池の起電力発生のメカニズム : pHと起電力
Other Titles: Mechanism of Potential Occurrence of Half-Cell -pH and Potential-
Authors: 濱田, 圭之助 / ラシッド, モクター・ビン
Authors (alternative): Hamada, Keinosuke / Rashid, Moktar Bin / 浜田, 圭之助
Issue Date: 28-Feb-1989
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.40, p.33-40; 1989
Abstract: It becomes clear that the potentials of a Daniell cell do not occur due to electrons which come from oxidation reaction Zn→Zn2++2e- and reduction one Cu2+2e-→Cu, but due to electrons which come from the following oxidation reaction M (Zn, Cu) +nH+→Mn++n/2・H2+ne-. Therefore a Daniel cell should be expressed by Cu| H+(xm)||H+(xm)|Zn istead of Cu|Cu2+(xm)|Zn. This shows that a voltaic cell Cu|H+(xm)|Zn is same as a Daniell cell Cu|H+(xm)||H+(xm)|Zn, because a salt bridge is only used as circuit of electrons. Accordingly a water cell Cu| H2O| Zn is possible, bebause a water cell is the voltaic cell with solution of 10-7m H+. The equation pH=△E/0.059-1, where △E is the potential of the cell Pt|H|H+(1m)||H+(xm)|H|Pt and pH=-log H+(xm), is theoretically obtained, based upon the above-mentioned mechanism of potential occurrence.
URI: http://hdl.handle.net/10069/32445
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 40

Citable URI : http://hdl.handle.net/10069/32445

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