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preface to fifteenth edition

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PRACTICAL LABORATORY INFORMATION 11.97<br />

TABLE 11.33<br />

Variation of 4 with pH<br />

pH log 4 pH log 4<br />

2.0 13.44 7.0 3.33<br />

2.5 11.86 8.0 2.29<br />

3.0 10.60 9.0 1.29<br />

4.0 8.48 10.0 0.46<br />

5.0 6.45 11.0 0.07<br />

6.0 4.66 12.0 0.00<br />

TABLE 11.34<br />

Formation Constants of EDTA Complexes at 25C, Ionic Strength Approaching Zero<br />

Metal ion log K MY Metal ion log K MY<br />

Co(III) 36 V(IV) 18.0<br />

V(III) 25.9 U(IV) 17.5<br />

In 24.95 Ti(IV) 17.3<br />

Fe(III) 24.23 Ce(III) 16.80<br />

Th 23.2 Zn 16.4<br />

Sc 23.1Cd 16.4<br />

Cr(III) 23 Co(II) 16.31<br />

Bi 22.8 Al 16.13<br />

Tl(III) 22.5 La 16.34<br />

Sn(II) 22.1Fe(II) 14.33<br />

Ti(III) 21.3 Mn(II) 13.8<br />

Hg(II) 21.80 Cr(II) 13.6<br />

Ga 20.25 V(II) 12.7<br />

Zr 19.40 Ca 11.0<br />

Cu(II) 18.7 Be 9.3<br />

Ni 18.56 Mg 8.64<br />

Pd(II) 18.5 Sr 8.80<br />

Pb(II) 18.3 Ba 7.78<br />

V(V) 18.05 Ag 7.32<br />

TABLE 11.35 Cumulative Formation Constants of Ammine Complexes at 20C, Ionic Strength 0.1<br />

Cation log K 1 log K 2 log K 3 log K 4 log K 5 log K 6<br />

Cadmium 2.65 4.75 6.19 7.12 6.80 5.14<br />

Cobalt(II) 2.11 3.74 4.79 5.55 5.73 5.11<br />

Cobalt(III) 6.7 14.0 20.1 25.7 30.8 35.2<br />

Copper(I) 5.93 10.86<br />

Copper(II) 4.31 7.98 11.02 13.32 12.66<br />

Iron(II) 1.4 2.2<br />

Manganese(II) 0.8 1.3<br />

Mercury(II) 8.8 17.5 18.5 19.28<br />

Nickel 2.80 5.04 6.77 7.96 8.718.74<br />

Platinum(II) 35.3<br />

Silver(I) 3.24 7.05<br />

Zinc 2.37 4.817.319.46

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