1908-9.] Hydrolysis of Salts of Amphoteric Electrolytes. 653 
that it cannot be reduced to a negligible quantity merely by the presence 
of an excess of base. 
As the presence of so much thiazole would increase the viscosity of 
the solution quite appreciably, a check experiment was carried out, using 
KC1 instead of HC1, in order to find the approximate correction which must 
be applied on this account. 
N 
16 
— KC1 in water 
16 
— HCi in thiazole 
16 
KC1 in N. thiazole [x v = 112*7 
= 1297 
= 9M 
N 
iu v for — thiazole hydrochloride in pure water instead of in thiazole will 
129 - 7 
therefore be approximately 91*1 X ^—^ = 104*8. 
But the amount of hydrolysis still not eliminated must be corrected for 
by a double approximation. Using the value ^,= 104-8 we find the 
. . N 
hydrolysis in — solution to be — 
- 
Pv 
176 - 104*8 
fx jjqi fx. v 392 — 104 8 
= •248. 
We must therefore subtract for the conductivity of the HCI present 
(supposing the hydrolysis to he reduced to one-sixteenth of what it would 
N 
be in equivalent — solution) — 
16 
(392- 104-8)2^ = 4-4. 
This gives us for the second approximation to jul v 104*8 — 4*4= 100 - 4. 
The hydrolysis will now be — 
M v — fx v 1 76 — 100‘4 _ 
/ x hci ~ Vv 392 — 100 '4 
Using this value in finding the correction for the HCI present, we have 
•26 
(392-100-4) -fT = 4*7. 
16 
The most probable value for /x v at v = 16 is therefore 104*8-4-7 = 100T. 
Now, assuming /m v to increase with dilution at the same rate as 
Winkelblech’s values for o-amidobenzoic acid, we have t = 2o'0° C. 
