الفهرس 
The Scope of the WorkOnly 14 pages are availabe for public view
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Abstract
The distribution of aniline, o-,m-, and p-ethoxyaniline
between both petroleum ether, and aqueous solutions of NaOl
of different concentrations, at different temperatures, was
studied. Petroleum ether ( b.p. 90° - 130°0 ) was used as
an extracting solvent because benzene leads to high distribu-
tion coefficients.(54)
70r accuracy in determining distribution coefficients,
the volumes of the two phases were arranged so as to keep
the amount of amine in the aqueous phase approximately equal
to that amount present in the organic phase, in which it was
estimated, since the formar was found by difference.
The amine in the organic layer was estimated by ultra -
violet absorption spectrophotometry.
In the distribution coefficient measurements, the amine
concentrations were arranged so as to give an equilibrium
amine concentration in the non-aqueous phase nearly equal to
that obtained in dissociation constant measurements, in ordor
to minimize any errors due to association, hydration, and
other distributing factors(15).
The distribution coefficients mp/ma’ in terms of
molali ties ot the amine, bet’1(een \)et-ro1.eum. e”’t.he-r end. eq,ueou8
sodium chloride solution were determined.
The activity coefficient of the amine in the aqueous
sodium chloride solution was calculated (84) from the value
of mp/ma and the corresponding value at zero molality, taking
zero molality as the standard state, when by definition f=l,
and taking the activity coefficient of the amine, in the
organic phase, equal to unity.
The salting coefficient(44d) was obtained from the best
linear relation of log fAme VS. the sum of the amine and
sodium chloride concentrations, in the aqueous phase. This
linearity is in concordance with the findines of Randall and
Faile7(71, •