Which statement is not correct for Kohlrausch law:a)The law is valid at infinite dilutionb)The law is valid for weak electrolytes onlyc)The basis of law is independent migrat ion of ionsd)None of these.Correct answer is option 'B'. Can you explain this answer?

Question

Answer

Kohlrausch law is a statement that describes the ionic conductivity of electrolyte solutions. Here are the details about the correctness of statements related to the Kohlrausch law:

Validity of Kohlrausch law:
- The law is valid at infinite dilution: This statement is correct. The Kohlrausch law is based on the assumption that at infinite dilution, the ions are completely separated and their contribution to the conductivity is additive. This assumption is valid because at infinite dilution, the interactions between ions are negligible.
- The law is valid for weak electrolytes only: This statement is incorrect. The Kohlrausch law is applicable to both strong and weak electrolytes. However, it is more useful for weak electrolytes because their conductivities are very low and difficult to measure directly.
- The basis of the law is independent migration of ions: This statement is correct. The Kohlrausch law states that the molar conductivity of an electrolyte solution is the sum of the molar conductivities of its constituent ions, which migrate independently in the solution.
- None of these: This statement is not a valid option because some of the statements are correct and some are incorrect.

In summary, the correct statement is option B, which is incorrect. The Kohlrausch law is applicable to both strong and weak electrolytes, and it is based on the assumption of independent migration of ions.

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