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When 1/Λm is plotted against cΛm for an aqueous solution of a weak monobasic acid (HX), the graph yields a straight line with an intercept on the y-axis equal to P and a slope equal to S. What is the value of the ratio P/S?
- KaΛm⁰
- KaΛm⁰/2
- 2KaΛm⁰
- 1/(KaΛm⁰)
Correct answer: KaΛm⁰
Solution
For weak electrolytes, the relationship between molar conductivity and concentration is given by Kohlrausch's law. The ratio P/S corresponds to KaΛm⁰, as derived from the slope and intercept of the graph.
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