576 
CHEMISTRY: E. W. WASHBURN 
of which the value of Ao for any salt can be calculated from a single 
value of Kc for that salt. A convenient value of C to employ generally 
for this purpose is 0.0001, and for this concentration the above ex- 
pression becomes Ao = 1.00476 Ao-oooi for all uni-univalent salts of strong 
acids and bases. 
The reason why strong acids and bases themselves, as well as salts 
of weak acids and bases, are not included in the scope of the laws as 
formulated above, is not because there is any reason to suppose that 
these substances form exceptions to the laws, but merely because there 
are no reliable data available for testing the laws in any of these cases, 
nor can such data be secured except by employing extremely pure water, 
such as that described above. 
The new rule for calculating Ao has been tested at concentrations 
0.0001 and 0.0002 in the case of all salts for which there are rehable 
data available, and in every instance the rule appHed to both con- 
centrations is found to give within the experimental error the same Ao 
value. As an illustration of this, the data for a few of the salts whose 
conductivities are most accurately known are shown in the accompany- 
ing table. A general revision of Ao values and ionic conductances on 
the basis of the above laws will be published later. 
TABLE 
Illustrating the Calculation of Aq Values for Typical Uni-Univalent Salts by Means 
OF THE General Relation, Ao = Aq + Ze)' Demonstrating the Identity of the 
Ke Values of all Such Salts up to C = 0 .0002. [Measurements by Kohlrausch and 
Maltby/ Corrected (+ 0.02%) for Metathesis but Not for Atomic Weights.] 
CX 104 
EQUIVALENTS PER 
LITER 
NaCL 
KNO3 
LiCl 
LiNOs 
Ac 
Ao 
Ac 
Ao 
Ac 
Ao 
Ac 
Ao 
1 
1.037 
Z£ = 0.0212 
108.20 
108.11 
108.04 
Mean 
108.72 
108 . 63 
108.57 
108. 64± .05 
125.48 
125.54 
Mean 
126.09 
126.15 
126. 12± .03 
98.17 
98.11 
Mean 
98.63 
98.57 
98.60± .03 
94.48 
94.44 
Mean 
94.92 
94.88 
94.90± .02 
1 
2.053 
Z£ = 0.0268 , 
107.83 
107.82 
107.82 
Mean 
108 . 65 
108.64 
108.64 
108. 64± .01 
125.16 
125.22 
Mean 
126.11 
126.17 
126. 14± .03 
97.85 
97.86 
Mean 
98.58 
98.59 
98.59± .01 
94.16 
94.14 
Mean 
94.90 
94.88 
94.89± .01 
0.5212 1 
\ 
X£ = 0 02017 J 
108.41 
108 . 69 
