Waec Model Questions Vol1 2022 Chemistry Question 40
Practice objective / multiple choice question 40 from the 2022 Waec Model Questions Vol1 Chemistry examination.
A 0.050 M aqueous solution of an unknown monobasic carboxylic acid has a measured conductivity of 1.20×10⁻⁶ S cm⁻¹ at 25 °C. The molar conductivity at infinite dilution (Λ∞) for this acid is 380 S cm² mol⁻¹. (a) Calculate the degree of dissociation (α) of the acid. (b) Using α, determine the acid dissociation constant Ka. (c) Identify the acid from the following common monobasic carboxylic acids: formic acid (Ka = 1.8×10⁻⁴), acetic acid (Ka = 1.8×10⁻⁵), propionic acid (Ka = 1.3×10⁻⁵).
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This is Waec Model Questions Vol1 2022 Chemistry Question 40. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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