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17/09/2021 5:26 pm
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The molar conductance of NaCl, HCl and CH3COONa at infinite dilution are 126.45,426.16 and 91.0 S cm2 mol–1 respectively. The molar conductance of CH3COOH at infinite dilution is
Choose the right option for your answer.
(1) 201.28 S cm2 mol–1
(2) 390.71 S cm2 mol–1
(3) 698.28 S cm2 mol–1
(4) 540.48 S cm2 mol–1
1 Answer
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17/09/2021 5:36 pm
Correct answer: (2) 390.71 S cm2 mol–1
Explanation:
∧m∞(NaCl) = 126.45 Scm2 mol–1
∧m∞(HCl) = 426.16 Scm2 mol–1
∧m∞(CH3COONa ) 3 91 Scm2 mol–1
∧m∞(CH3COOH) = ∧m∞(CH3COONa) + ∧m∞(HCl) - ∧m∞(NaCl)
= 91 + 426.16 – 126.45
= 391.72 S cm2 mol–1