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preface to fifteenth edition

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8.136 SECTION 8<br />

TABLE 8.27<br />

Potentials of the Elements and Their Compounds at 25C (Continued)<br />

Half-reaction<br />

Standard<br />

or formal<br />

potential<br />

Solution<br />

composition<br />

Thullium<br />

Tm 3 3e Tm 2.32<br />

Tin<br />

Sn 4 2e Sn 2 0.154<br />

SnCl<br />

2<br />

6 2e SnCl4 2 2Cl <br />

0.14<br />

2<br />

SnO 6H 2e Sn 2 3 3H 2 O<br />

0.849<br />

SnF 2 4e Sn 6F <br />

6 0.200<br />

Sn 2 2e Sn 0.1375<br />

SnCl 2 2e Sn 4Cl <br />

4 0.19 1 HCl<br />

HSnO H 2 O 2e Sn 3OH <br />

2 0.91<br />

Sn 4H 4e SnH 4 1.07<br />

Titanium<br />

TiO 2 2H e Ti 3 H 2 O 0.10<br />

TiO 2 2H 4e Ti H 2 O 0.86<br />

Ti 3 e Ti 2 0.37<br />

Ti 3 3e Ti 1.21<br />

Ti 2 2e Ti 1.63<br />

Tungsten<br />

2WO 3 2H 2e W 2 O 5 H 2 O 0.029<br />

WO 3 6H 6e W 3H 2 O 0.090<br />

WO 2 4H 2 O 6e W 8OH <br />

4 1.074<br />

WO 2 2H 2 O 2e WO 2 4OH <br />

4 1.259<br />

W 2 O 5 2H 2e 2WO 2 H 2 O 0.031<br />

3<br />

e 4<br />

W(CN) 8 W(CN) 8 0.457<br />

WO 2 4H 4e W 2H 2 O 0.119<br />

WO 2 2H 2 O 4e W 4OH 0.982<br />

Uranium<br />

2<br />

e <br />

UO2 UO2 0.16<br />

2<br />

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

0.27<br />

<br />

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

0.38<br />

U 4 e U 3 0.52<br />

U 4 4e U 1.38<br />

U 3 3e U 1.66<br />

Vanadium<br />

<br />

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

1.000<br />

<br />

VO 4H 2e V 3 2 2H 2 O<br />

0.668<br />

<br />

VO 4H 3e V 2 2 2H 2 O<br />

0.361<br />

<br />

VO 4H 5e 2 V 4H 2 O<br />

0.236<br />

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

V 3 e V 2 0.255<br />

V 2 2e V 1.13<br />

Xenon<br />

H 4 XeO 6 2H 2e XeO 3 3H 2 O 2.42<br />

HXeO 3 2H 2 O e HXeO 4 4OH <br />

6 0.9<br />

XeO 3 6H 2F 4e XeF 2 3H 2 O 1.6<br />

XeO 3 6H 6e Xe(g) 3H 2 O 2.10<br />

XeF 2 e XeF F 0.9<br />

XeF 2 2H 2e Xe(g) 2HF 2.64<br />

XeF e Xe(g) F 3.4

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