AQUEOUS SOLUTIONS.—ARCHIBALD. BEY; 
the same units as in Table I. In calculating the concentration 
of ions, the value of the molecular conductivity at infinite 
dilution was taken to be 1080, according to Kohlrausch’s* deter- 
mination. 
Mixtures of equal volumes of equi-molecular solutions of 
Zine and Copper Sulphates were then prepared, and their con- 
ductivity measured. In Table V are given the necessary data 
for the calculation of the conductivity of each mixture examined, 
together with the observed and calculated values and the 
differences expressed as percentages. The different values are 
expressed in terms of the same units as in Table IT. 
TABLE V. 
PeRrcutnens Sola: Concen- | Dilution in the Conductivity of Mixture. 
tions. eatin cae Mixture. 
ee 
} Zn SO,.| CuSO, f Zn $O,,| $CuS0, ] Caleu- | gpservea, Differences 
| 1.000 1.000 2252 1.032 .968 |245.1 245.4 —0.12 
.850 .850 2006 ° 1.212 1.140 |215.6 | 215.3 +0.13 
-7500 -7500 1832 1.382 1.284 |199.4 | 199.7 — 0.15 
.6000 .6000 1562 1.744 1.588 1170.1 170.5 — 0.23 
| .5000 .5000 1354 2.080 1.920 147.5 | 147.3 +0.12 
-4000 .4000 1144 2.600 2.400 |124.6 | 124.5 +0.08 
-2000 -2000 0674 5.22 Zt) || 7Bes0 || TE +0.18 
. L000 .1000 .0393 10.22 9.78 | 42.76 | 42.83 —0.16 
.0850 -0850 .0346 12.10 11.42 | 37.68 | 37.63 +0.13 
.0750 .0750 .0814 13.80 12.86 | 33.82 | 33.88 —0.17 
.06000 | .06000 | .02618 | 17.26 16.06 | 28.50 | 28.55 —0.17 
.05000 | .05000 | .02245 | 20.70 19.30 | 24.05 | 24.01 +0.16 
-04000 | .04000 | .01866 | 26.1 24.0 20.32 | 20.36 —0.19 
.02000 | .02000 | .01105 | 51.6 48.4 12.03 | 12.05 —0.15 
-01250 | .01250 | .00753 | 82.1 17.9 7.837) 7.830 | +0.08 
* Wied. Ann. Vol. xxvi (1885), p. 195. 
