242 RELATION OF PHYSICAL PROPERTIES OF AQUEOUS SOLUTIONS 
following values of differences of molecular conductivity will 
be sufficient : 
(P,—P,)/n FOR CONDUCTIVITY. 
n 
HCl and 1H,SO, and Ag NO, and 
HCl and NaCl. ; K,CO, 2 AG No, Na éi. 
0:01 2454 2333 1838 + 55 
0-1 2379 2365 1198 + 21 
0:5 2260 2289 TEZ/L — 29 
1:0 2085 2120 1185 — 60 
Compare with this the following table of values of w, and 
U5 == 
IONIZATION—COEFFICIENTS (a). 
7 
HCl NaCl 4K,CO, 4H,S0,, AgNo,, 
= 3500. | 4,=1030. | »,=1400. | 1». =3700. | 4,=1090. 
0-01 ‘976 934 ‘773 ‘772 933 
0-1 927 310 ‘628 563 "794 
05 ‘862 "735 520 513 ‘668 
1:0 794 615 471 492 582 
The approximate constancy holds in the case of HCl and 
3K,CO,, because uw, for HC] being more than twice as great as 
for }K,CO,, « for the jatter falls off nearly twice as rapidly 
as for the former. In the case of AgNO, and NaCl there is 
no approximation to constancy, because the values of m, being 
nearly equal, the rates at which @ varies with nm are very 
unequal. 
THE INDEPENDENCE OF THE CONTRIBUTIONS MADE TO THE 
VALUE OF A PROPERTY BY THE FREE IONS. 
The constant lJ for a salt ap will, according to the dissocia- 
tion conception, be composed additively of two parts, J, and lp, 
pertaining to the ions @ and p respectively, and these constants 
