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preface to fifteenth edition

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8.138 SECTION 8<br />

TABLE 8.28<br />

Potentials of Selected Half-Reactions at 25C (Continued)<br />

Half-reaction<br />

E, volts<br />

<br />

2IO3 12H 10e I2 3H2O<br />

1.195<br />

N 2 O 4 2H 2e 2HNO 3 1.07<br />

<br />

2ICl 2e 4Cl 2 I 2<br />

1.07<br />

Br 2 (1q) 2e 2Br 1.065<br />

N 2 O 4 4H 4e 2NO 2H 2 O 1.039<br />

HNO 2 H e NO H 2 O 0.996<br />

<br />

NO 4H 3e 3 NO 2H 2 O<br />

0.957<br />

<br />

NO 3H 2e 3 HNO 2 H 2 O<br />

0.94<br />

2 2<br />

2Hg 2e Hg 2 0.911<br />

Cu 2 I e CuI 0.861<br />

OsO 4 (c) 8H 8e Os 4H 2 O 0.84<br />

Ag e Ag 0.7991<br />

2<br />

Hg 2e 2 2Hg<br />

0.7960<br />

Fe 3 e Fe 2 0.771<br />

H 2 SeO 3 4H 4e Se 3H 2 O 0.739<br />

<br />

HN3 11H 8e 2NH4 0.695<br />

O 2 2H 2e H 2 O 2 0.695<br />

<br />

2<br />

Ag2SO4 2e 2Ag SO4 0.654<br />

Cu 2 Br e CuBr(c) 0.654<br />

Au(SCN) 3e Au 4SCN <br />

4 0.636<br />

2HgCl 2 2e Hg 2 Cl 2 (c) 2Cl 0.63<br />

Sb 2 O 5 6H 4e 2SbO 3H 2 O 0.605<br />

H 3 AsO 4 2H 2e HAsO 2 2H 2 O 0.560<br />

TeOOH 3H 4e Te 2H 2 O 0.559<br />

Cu 2 Cl e CuCl(c) 0.559<br />

<br />

I3 2e 3I<br />

0.536<br />

I 2 2e 2I 0.536<br />

Cu e Cu 0.53<br />

4H 2 SO 3 4H 6e SO 2<br />

4 6 6H 2 O<br />

0.507<br />

Ag 2 CrO 4 2e 2<br />

2Ag CrO 4 0.449<br />

2H 2 SO 3 2H 4e 2<br />

S 2 O 3 3H 2 O<br />

0.400<br />

<br />

UO 4H e U 4 2 2H 2 O<br />

0.38<br />

3 4<br />

Fe(CN) 6 e Fe(CN) 6 0.361<br />

Cu 2 2e Cu 0.340<br />

VO 2 2H e V 3 H 2 O 0.337<br />

BiO 2H 3e Bi H 2 O 0.32<br />

2 4<br />

UO2 4H 2e U 2H2O<br />

0.27<br />

Hg 2 Cl 2 (c) 2e 2Hg 2Cl 0.2676<br />

AgCl e Ag Cl 0.2223<br />

SbO 2H 3e Sb H 2 O 0.212<br />

2 <br />

CuCl3 e Cu 3Cl<br />

0.178<br />

<br />

2 <br />

SO4 4H 2e HSO 2 3 HO 2 0.158<br />

Sn 4 2e Sn 2 0.15<br />

S 2H 2e H 2 S 0.144<br />

Hg 2 Br 2 (c) 2e 2Hg 2Br 0.1392<br />

CuCl e Cu Cl 0.121<br />

TiO 2 2H e Ti 3 H 2 O 0.100<br />

2 2<br />

SO 4 6 2e 2S2O3 0.08<br />

AgBr e Ag Br 0.0711<br />

HCOOH 2H 2e HCHO H 2 O 0.056<br />

CuBr e Cu Br 0.033<br />

2H 2e H 2 0.0000<br />

Hg 2 I 2 2e 2Hg 2I 0.0405

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