The molar conductivities at infinite dilution for sodium acetate, HCI and NaCI are 91 S c m 2 m o l - 1 , 425.9 S c m 2 m o l - 1 and 126.4 S c m 2 m o l - 1 respectively. The molar conductivity of acetic acid at infinite dilution is

Step-by-step solution

Key Idea kohlrausch law of independent migration of ions can be used to calculate Δ m o for weak electrolyte such as acetic acid. Given, Δ m ( N a A C ) o = 91 S c m 2 m o l - 1 Δ m ( H C I ) o = 425.9 S c m 2 m o l - 1 Δ m ( N a C l ) o = 126.4 S c m 2 m o l - 1 Using Kohlrausch law, to find the molar conductivity of acetic acid. Δ m ( H A C ) o = λ H + o + λ A C - o = λ H + o + λ C l - o + λ A C - o + λ N a + o - λ C l - o - λ N a + o = Δ m ( H C I ) o + Δ m ( N a A C ) o - Δ m ( N a C l ) o = ( 425.9 + 91.0 - 12