氧化还原及电极电位（Oxidation-reduction and electrode potential）.docVIP

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氧化还原及电极电位（Oxidation-reduction and electrode potential）.doc

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氧化还原及电极电位（Oxidation-reduction and electrode potential）

氧化还原及电极电位（Oxidation-reduction and electrode potential） The eighth chapter is redox reaction and electrode potential Home page Problem analysis Student self test questions Student answer Chapter after Exercises answer Problem analysis [TOP] Example 8-1 write and trim the electrode response and battery reaction of each of the following batteries and indicate the type of electrode. (1) (-) Ag (s), AgCl (s), HCl (SLN), Cl2 (100KP), Pt (s) (+) (2) (-) Pb (s), PbSO4 (s), K2SO4 (SLN), KCl (SLN), PbCl2 (s), Pb (s) (+) (3) (-) Zn (s), Zn2+ (C1), MnO4- (C2), Mn2+ (C3), H+ (C4), Pt (s) (+) (4) (-) Ag (s) | Ag+ (C1) = Ag+ (C2), Ag (s) (+) The analysis splits the primary cell into two electrodes. The negative electrode has an oxidation reaction, and the positive electrode undergoes a reduction reaction. The positive and negative reaction forms are written, and the battery reaction is formed by adding the anode reaction and the negative electrode reaction. The solution (1) the positive reaction of Cl2 (g) +2e-, 2 (AQ) belongs to Cl - gas electrode The negative electrode reaction is Ag (s) +Cl- (AQ) - AgCl (s) +e-, which belongs to the metal insoluble salt anion electrode The battery responded 2Ag (s) + Cl2 (g) to 2AgCl (s) n=2 (2) the positive reaction PbCl2 (s) +2e- to Pb (s) +2Cl- (AQ) belongs to the metal insoluble salt anion electrode The negative electrode reaction is Pb (s) +SO42- (AQ) - PbSO4 (s) +2e-, which belongs to the metal insoluble salt anion electrode The battery reacted with PbCl2 (s), +SO42- (AQ), PbSO4 (s), +2Cl- (AQ), n=2 (3) the positive reaction, MnO4- (AQ), +8H+ (AQ), +5e- - Mn2+ (AQ) + 4H2O (L), belongs to the redox electrode The negative reaction Zn (s) to Zn2+ (AQ) +2e- belongs to the metal metal ion electrode 2MnO4- (AQ) +16H+ cell reaction (AQ) 5Zn (s), 2Mn2+ (AQ) 8H2O (L) 5Zn2+ (AQ) n=10 (4) the positive reaction Ag+ (C2) +e- to Ag (s) belongs to the metal metal ion electrode The negative reaction Ag (s) to Ag+ (C1) + e- belongs to the metal metal ion