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Equivalent conductances of NaCl, HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91 ohm⁻¹ cm² respectively. The equivalent conductance of CH₃COOH at infinite dilution would be:

1. 101.38 ohm⁻¹ cm²
2. 253.62 ohm⁻¹ cm²
3. 390.71 ohm⁻¹ cm²
4. 678.90 ohm⁻¹ cm²

Correct answer: 390.71 ohm⁻¹ cm²

Solution

The equivalent conductance of CH₃COOH at infinite dilution can be calculated using Kohlrausch's Law of Independent Migration of Ions: λ°(CH₃COOH) = λ°(HCl) + λ°(CH₃COONa) - λ°(NaCl). Substituting the given values: 426.16 + 91 - 126.45 = 390.71 ohm⁻¹ cm².

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