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According to Kohlrausch’s law, at what condition does each ion contribute a fixed amount to the conductance of an electrolyte, irrespective of the other ion present?

1. At finite dilution, each ion contributes a definite amount to the equivalent conductance of an electrolyte, regardless of the other ion present.
2. At infinite dilution, each ion contributes a definite amount to the equivalent conductance of an electrolyte, depending on the other ion present.
3. At infinite dilution, each ion contributes a definite amount to the conductance of an electrolyte, regardless of the other ion present.
4. At infinite dilution, each ion contributes a definite amount to the equivalent conductance of an electrolyte, regardless of the other ion present.

Correct answer: At infinite dilution, each ion contributes a definite amount to the equivalent conductance of an electrolyte, regardless of the other ion present.

Solution

Kohlrausch's law states that at infinite dilution each ion contributes a definite amount to the EQUIVALENT conductance of the electrolyte, independent of (regardless of) the other ion present. Option (d) is the precise statement; option (c) wrongly says 'conductance' instead of 'equivalent conductance.'

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