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preface to fifteenth edition

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ELECTROLYTES, EMF, AND CHEMICAL EQUILIBRIUM 8.145<br />

TABLE 8.30<br />

Half-Wave Potentialsof Inorganic Materials(Continued)<br />

Element E 1/2 , volts Solvent system<br />

Titanium<br />

4 <strong>to</strong> 3 0.173 0.1M K 2 C 2 O 4 plus1M H 2 SO 4<br />

1.22 0.4M tartrate, pH 6.5<br />

Tungsten<br />

6 0.0; 0.64 6M HCl; two waves: first wave starts at zero and is W(VI)<br />

<strong>to</strong> W(V), the second wave is W(V) <strong>to</strong> W(III)<br />

Uranium<br />

6 0.180; 0.92 2 <br />

UO <strong>to</strong> UO , then U 3 in 0.02M HCL<br />

2 2<br />

Vanadium<br />

5 <strong>to</strong> 4 <strong>to</strong> 2 0.97; 1.26 1M NH 4 Cl plus1M NH 3 and 0.08M Na 2 SO 3<br />

4 <strong>to</strong> 2 0.98 0.05M H 2 SO 4<br />

3 <strong>to</strong> 2 0.55 0.5M H 2 SO 4<br />

4 <strong>to</strong> 5 0.32 1M NH 4 Cl, 1M NH 3 , and 0.08M Na 2 SO 3<br />

4 <strong>to</strong> 5 0.76 0.05M H 2 SO 4 ; anodic wave starting from zero<br />

2 <strong>to</strong> 3 0.55 0.5M H 2 SO 4 ; anodic wave<br />

Zinc<br />

2 <strong>to</strong> 0 0.995 0.1M KCl<br />

1.01 0.1M KSCN<br />

1.15 0.5M tartrate, pH 9<br />

1.23 0.5M tartrate, pH 4.5<br />

1.33 1M NH 4 Cl plus1M NH 3<br />

1.53 1M NaOH

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