Question

\[\ce{\Lambda^{\circ}_m CH3COOH}\] can be calculated if the values of the following are given:

1. \[\ce{\Lambda^{\circ}_m HCl, \Lambda^{\circ}_m KCl and \Lambda^{\circ}_m CH3COOK}\]
2. \[\ce{\Lambda^{\circ}_m NaCl, \Lambda^{\circ}_m KCl and \Lambda^{\circ}_m CH3COONa}\]
3. \[\ce{\Lambda^{\circ}_m H2SO4, \Lambda^{\circ}_m Na2SO4 and \Lambda^{\circ}_m CH3COONa}\]

Options

• Only 1

• Either 1 or 2

• Either 1 or 3

• Either 2 or 3

Answer 1

Either 1 or 3

Explanation:

\[\ce{\Lambda^{\circ}_m CH3COOH = \Lambda^{\circ}_m HCl + \Lambda^{\circ}_m CH3COOK -  \Lambda^{\circ}_m KCl}\]

= \[\ce{1/2 \Lambda^{\circ}_m H2SO4 + \Lambda^{\circ}_m CH3COONa - 1/2 \Lambda^{\circ}_m Na2SO4}\]