Question

If the molar conductivities at infinite dilution at 293K for aqueous hydrochloric acid, sodium acetate and sodium chloride solution are 383.5, 78.4 and 102.0 S cm^(2) respectively, calculate themolar conductivity or acetic acid at this temperature and dilution. if the molar conductivity of acetic acid at some other dilution is 100.0 S cm^(2) at 293K, calculate the degree of ionization of acetic acid at this dilution.​

Answer 1

Answer:

The molar conductivity of NaCl,HCl and CH

3

COONa at infinite dilution are 126.45,426.16 and 91 Scm

2

mol

−1

respectively. The molar conductivity of CH

3

COOH at infinite dilution is 390.71 Scm

2

mol

−1

.

The calculations are as shown below:

λ

CH

3

COOH

∞

=λ

CH

3

COONa

∞

+λ

HCl

∞

−λ

NaCl

∞

λ

CH

3

COOH

∞

=91 Scm

2

mol

−1

+426.16 Scm

2

mol

−1

−126.45 Scm

2

mol

−1

λ

CH

3

COOH

∞

=390.71 Scm

2

mol

−1