Given below are two statements:
Statement I: For $KI$ , molar conductivity increases steeply with dilution.
Statement II: For carbonic acid, molar conductivity increases slowly with dilution. In the light of the above statements, choose the correct answer from the options given below

Question

Given below are two statements:

Statement I: For $KI$ , molar conductivity increases steeply with dilution.

Statement II: For carbonic acid, molar conductivity increases slowly with dilution. In the light of the above statements, choose the correct answer from the options given below

TestHub · Accepted Answer

For strong electrolytes, ∧ m increases slowly with dilution and can be represented by the equation: ∧ m = ∧ m o - A c 1 2 It can be seen that if we plot ∧ m against c 1 2 , We obtain a straight line with intercept equal to ∧ m and slope equal to ' - A '. The value of the constant ' A ' for a given solvent and temperature depends on the type of electrolyte. KI is a strong electrolyte. Weak electrolytes like carbonic acid and have lower degree of dissociation at higher concentrations and hence for such electrolytes, the change in ∧ m with dilution is due to increase in the degree of dissociation and consequently the number of ions in total volume of solution that contains 1 mol of electrolyte. In such cases ∧ m increases steeply on dilution, especially near lower concentrations. Therefore, ∧ m o cannot be obtained by extrapolation of ∧ m to zero concentration.

Chemistry - Electrochemistry Question with Solution | TestHub

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