328
THEORY
OF
BROVNIAN
MOTION
Substituting
this
value of
k
and
the value of
v
obtained
from
the
previously
found equation,
l
v=
96,000'
in
equation
(2),
we
get
a,
k
108-9,600-96,000
^
= =
t^
With
the usual definition
of
l,
this formula holds
for
polyvalent
ions
as
well.
Substituting
this value for
in equation
(8),
we
get
A
=
4.25-10"5.
The
formula
yields
for
room
temperature and
r=1
[19]
Ion
l
A
in
microns
H
300 125
K
65 58
Diisoamylammonium
ion
C10H24N
24 35
Received
on
1
April