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preface to fifteenth edition

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ELECTROLYTES, EMF, AND CHEMICAL EQUILIBRIUM 8.135<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 />

<br />

4HSO 8H 6e 2<br />

3 S 4 O6 6H 2 O<br />

0.577<br />

2SO 2 (aq) 2H 4e 2<br />

S 2 O3 H 2 O<br />

0.400<br />

2SO 3 3H 2 O 4e S 2 O3 6OH <br />

0.576 1 NaOH<br />

SO<br />

3 3H 2 O 4e S 6OH <br />

0.59 1 NaOH<br />

2<br />

S 4 O 2e 2<br />

6 2S 2 O3 0.080<br />

2<br />

S 2 O3 6H 4e 2S 3H 2 O<br />

0.5<br />

SF 4 (g) 4e S 4F 0.97<br />

S 2 Cl 2 (g) 2e 2S 2Cl 1.19<br />

S H 2e HS 0.287<br />

S 2H 2e H 2 S(aq) 0.144<br />

S 2H 2e H 2 S(g) 0.174<br />

S 2e S 2 0.407<br />

Tantalum<br />

Ta 2 O 5 10H 10e 2Ta 5H 2 O 0.81<br />

TaF<br />

7 5e Ta 7F <br />

0.45<br />

Technetium<br />

<br />

TcO4 4H 3e TcO 2 2H 2 O<br />

0.738<br />

<br />

TcO4 2H e TcO 3 H 2 O<br />

0.700<br />

<br />

TcO e 2<br />

4 TcO4 0.569<br />

<br />

TcO4 8H 7e Tc 4H 2 O<br />

0.472<br />

2<br />

TcO4 4H 2e TcO 2 2H 2 O<br />

1.39<br />

TcO 2 4H 4e Tc 2H 2 O 0.272<br />

Tc e Tc ca. 0.5<br />

Tellurium<br />

H 2 TeO 4 6H 2e Te 4 4H 2 O 0.929<br />

H 2 TeO 4 2H 2e TeO 2 (c) 2H 2 O 1.02<br />

2<br />

2H 2e 2<br />

TeO4 TeO3 H 2 O<br />

0.897<br />

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

H 2 TeO 3 4H 4e Te 3H 2 O 0.589<br />

2<br />

TeO 6H 4e 3 Te 3H 2 O<br />

0.827<br />

TeO 2 3H 2 O 4e Te 6OH <br />

3 0.415<br />

TeO 2 (c) 4H 4e Te 2H 2 O 0.521<br />

Te 2H 2e H 2 Te(aq) 0.740<br />

Te H 2e HTe 0.817<br />

Te 2 2H 2e 2HTe 0.794<br />

Terbium<br />

Tb 3 3e Tb 2.31<br />

Thallium<br />

Tl 3 2e Tl 1.25 1 HClO 4<br />

0.77 1 HCl<br />

Tl 3 3e Tl 0.72<br />

Tl e Tl 0.336<br />

TlCl e Tl Cl 0.557<br />

TlBr e Tl Br 0.658<br />

TlI e Tl I 0.752<br />

Thorium<br />

Th 4 4e Th 1.83

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