Assertion : Molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally.Reason : Kohlrausch's law is used to find the molar conductivity of a weak electrolyte at infinite dilution.
Question
Assertion : Molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally.Reason : Kohlrausch's law is used to find the molar conductivity of a weak electrolyte at infinite dilution.
Solution
The assertion is incorrect while the reason is correct.
Step 1: Understanding the Assertion The assertion states that the molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally. This is incorrect. The molar conductivity of a weak electrolyte at infinite dilution can indeed be determined experimentally using Kohlrausch's Law of Independent Migration of Ions.
Step 2: Understanding the Reason The reason given is that Kohlrausch's law is used to find the molar conductivity of a weak electrolyte at infinite dilution. This is correct. Kohlrausch's law allows us to calculate the limiting molar conductivity of a weak electrolyte by knowing the limiting molar conductivities of its constituent ions.
Step 3: Connecting Assertion and Reason The assertion is incorrect because it contradicts the reason. The reason correctly states that Kohlrausch's law can be used to determine the molar conductivity of a weak electrolyte at infinite dilution, which directly contradicts the assertion that this cannot be determined experimentally.
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