Question

A solution of 0.1 M acetic acid at 250 C has a specific conductance of 5.226 x 10-4 ohm-1 cm-1 .
i) find the equivalent conductivity of 0.1 M acetic acid.
ii) Find the equivalent conductivity of acetic acid at infinite dilution .
( Ka for acetic acid is= 1.8 x10-5 )

Answer 1

Answer:

The specific conductance of a 0.01M solution of acetic acid at 298K is 1.65×10

−4

ohm

−1

cm

−1

. The molar conductance at infinite dilution for H

+

ion and CH

3

COO

−

ion are 349.1ohm

−1

cm

2

mol

−1

and 40.9ohm

−1

cm

2

mol

−1

respectively.

Calculate:

(i) Molar conductance of the solution.

(ii) Degree of dissociation of CH

3

COOH.

(iii) Dissociation constant for acetic acid.