The molar conductances of HCl, NaCl and $C H_{3} C O O N a$ are 426, 126 91 $Ω^{- 1} c m^{2} m o l^{- 1}$ respectively. The molar conductances of $C H_{3} C O O H$ is :

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If Λ0m for NaCl,HCl and CH3COOH are 110,100 and 390 mole−1 respectively. Determine the value of Λ0m for CH3COONa?

Apply Kohlrausch law of independent migration of ions.Λ0m(CH3COONa)=Λ0m(CH3COOH)+Λ0m(NaCl)−Λ0m(HCl)Λ0m(CH3COONa)=390+110−100Λ0m(CH3COONa)=400Sm2/mol

If $Λ_{m}^{0}$ for $N a C l, H C l$ and $C H_{3} C O O H$ are $110, 100$ and $390 m o l e^{- 1}$ respectively. Determine the value of $Λ_{m}^{0}$ for $C H_{3} C O O N a$ ?

Apply Kohlrausch law of independent migration of ions.
$Λ_{m}^{0} (C H_{3} C O O N a) = Λ_{m}^{0} (C H_{3} C O O H) + Λ_{m}^{0} (N a C l) - Λ_{m}^{0} (H C l)$
$Λ_{m}^{0} (C H_{3} C O O N a) = 390 + 110 - 100$
$Λ_{m}^{0} (C H_{3} C O O N a) = 400 S m^{2} / m o l$