662 
d ; a 
18a ——— em./sec., the quantity of ions that reaches the cathode 
96500 
| t be diminished b iy eee that tl ti 
Bet r 18a ‚ SO juantity 
Le, second must be diminished by 18a 97) vat the quantity 
of ions arriving at the cathode in a second, is given by: 
Dredd d 
GOELE EN a-—-—¢. (18) 
86400 da 96500 
d 
which expression must, therefore, be eyual to 96500: 
From this follows: 
de 
dl +1800) AAD . 22 4 ee 
dx 
or 
d de 
ti gp ae BA 
ie Reps 418 ac 
By integration : 
Sea 18 a) LK. 
in which for e=0 c=c, and for rc=d c=C, hence 
be lie. jha 
LAT Dh ee ae 
If the cathodic current density is taken negative, the anodic 
positive, the following equation holds: 
d 1 1+ 18 ac 
TE (EE ene 
1117 D dee Ae al 
both for cathodic and for anodic polarisation. 
By combining (21) with the equation for the potential difference 
0.058 |, 
BE=eé+ Tr log ¢ 
we can indicate # as function of d. 
The cathodic limiting current is here: 
D 
dK limit = — 1.117 ——_K(1 4+ 18aC) . . . . (22 
K tint gill + 1800) (22) 
while 
=) _ 0.025 d (1 + 18 aC) (28) 
d=0 
Ad 1.117 DCn 
It appears from these equations as was indeed to be expected, 
that the influence of hydration on the course of the current potential 
line is slight. When the solution contains 1 gram-ion per liter, when 
