66 CONDUCTIVITY, ETC., OF AQUEOUS SOLUTIONS.—BARNES. 
TABLE IX. 
SPECIFIC GRAVITY AT 18° C. REFERRED TO WATER AT 18° C. 
Concentration of Ionization Coefficients = =~ 3 2 2 
Constituent Solutions. in Mixture. o's =e = 
as is o 
Le Ss q 
| 2 2 = 
y K2S0q4. K Cl. + KeSO4 K Cl. 1) Y = 
=o —— ep ae ———— ee ee 
. 10385 .O1018 oO) | 879 1.00389 1.003893 | +0.04 4 
| " .05412 721 874 1.00497 1.00496 | —0.0,4 1 
TI07 09454 .086 .800 1.02899 1.02899 | +0.0, 0 
.0998 .9558 .D8o .766 1.04271 1.04841 | +0.0, 7 
TABLE X. 
SURFACE TENSION AT 1]d° C., 
Constituent Solutions. Tonization a5 | ge g 
oe ||) Coefficients o's | ZS 5 
Conceatration. Volume. in Mixture. 5 5 3 
ee SS eee 
PKOSO,., KIC | PKaSO,) | KCI [2KoSO,.| KEL | © o a 
7243 .2718 49124 50902 581 .769 | 7.488 | 7.4385 | — 0.008 
| 
| 
| 
.2423 | .7483 590535 49466 .569 788 | 7.447 | 7.480 | —0.017 
8917 .6869 49330 .50693 505 -763 | 7.471 | 7.475 , +0.004 | 
4921 | 1.7115 
1.1936 | 1.4158 
.01100 48989 
49646 | 500354 
470 | .742 | 7.527! 7.529 | +0.002 
445 | .740 | 7.554 | 7.550 | —0.004 
According to Table IX it appears that the specific gravity of 
a solution of these salts from an average concentration of about 
0.05 to 0.5 can be calculated by the above formula, and with the 
above values of the ionization constants. 
From Table X this formula applies for surface tension of 
solutions of these salts from a concentration of 0.5 to 1.3. 
Summary of Results. 
According to the above results it is possible, by the aid of 
the dissociation theory and with data obtained from the simple 
solutions, to predict the conductivity, specitic gravity and surface. 
tension, of fairly dilute solutions of potassium chloride and 
potassium sulphate, within the limit of experimental error. 
