Download - 第十一章 电 化 学
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11-1
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1780 L.Galvani1799A.Volta.
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A. Volta (1745-1827Volta Pile
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Volta Pile
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1780 179918341887.
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ISE
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(a) i i i
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(a) i i i (b) (c)
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Electrochemical PotentialGi = i- i + Zie0( - ) i + Zie0 = i + Zie0
i
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Electrode)/Zn|Zn2+, SO42-Pt|H2,H+Fe|Fe3O4|Fe2O3|
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Electrode)/Zn|Zn2+,SO42-,Pt|H2,H+Fe|Fe3O4|Fe2O3|
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Electrode (ElectrochemicalReaction
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Electrode (ElectrochemicalReaction
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(Electrochemical Device)(Cell)() (Primary Cell)(G0)
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(1860--) ()
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(1860--)eePb2+PbSO4 +2ePbPb2+PbSO4 -2ePbO2H2O H+SO4=SO4= H+ ()
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(Electrochemical Device)()
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Pb2+PbSO4 -2eeePb2+PbSO4 +2ePbPbO2H2O H+SO4=SO4= H+
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Anode Cathode
Anion
Cation
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Anode Cathode
Anion
Cation
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11-2 Faraday law (1834)Q- n-Z-F-1891
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F (1891)F = 6.0231023 /mol 1.60210-19 / = 96487 /mol 96500 c /mol
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1. FQ = nZF
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1. 2.
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Cl2AgFe2+Ag+Br2H2e-e-ii (1) NaCl (2) AgNO3(3) FeBr3
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(1) : H++e-1/2H2 : Cl- 1/2Cl2+e-(2) : Ag++e-Ag : AgAg++e-(3) : Fe3++e-Fe2+ : Br- 1/2Br2+e-
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1. 2. 3.
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Na+H+Cl-OH-e-iH2Cl2Ag+H+NO3-Ag+Age-iAg+
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1. 2. 3. 4.
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H+OH-e-iH2H+NO3-Ag+Age-iAg+OH-NO3-Ag+O2Ag+ + e = AgH+ + e = 1/2 H2
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11-3.
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XYZX + Y + Z123123
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TR TR