Question

Electrolyte	KCl	KNO3	HCl	NaOAC	NaCl
Λ_ (S cm mol−1)	149.9	145.0	426.2	91.0	126.5

Calculate \[\ce{Λ^∘_{HOAC}}\] using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25°C.

Options

• 517.2

• 552.7

• 390.7

• 217.5

Answer 1

390.7

Explanation:

(Λ_∞)_HOAC = [(Λ°)_HCl + (Λ°)_NaOAC] − (Λ°)_NaCl

= (426.2 + 91) − (126.5)

= 390.7