MHT CET 2025 Chemistry question
What is present dissociation of if molar conductance at zero concentration for , and are 130, 109 and 213 S cmmol respectively and molar conductivity of is 0.01 M is 9.0 S cmmol?
Answer: (D)
Solution
By Kohlrausch's law, \Lambda^\circ_m(NH_4OH)=\Lambda^\circ(NH_4Cl)+\Lambda^\circ(NaOH)-\Lambda^\circ(NaCl)=130+213-109=234\ S\,cm^2mol^{-1}. Degree of dissociation . Percent dissociation
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