Waec Model Questions Vol1 2017 Chemistry Question 27

Practice objective / multiple choice question 27 from the 2017 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 27 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

A buffer solution is prepared by mixing 0.250 L of 0.20 M acetic acid (CH₃COOH) with 0.150 L of 0.15 M sodium acetate (CH₃COONa). The measured pH of the resulting solution is 4.74. Using this information, determine the experimental acid dissociation constant (K_a) of acetic acid.

Answer Options

Correct Answer A. 8.2 × 10⁻⁶
B. 9.1 × 10⁻⁶
C. 1.2 × 10⁻⁵
D. 6.5 × 10⁻⁶
Correct Answer
A
Correct Option:
8.2 × 10⁻⁶

About This Question

This is Waec Model Questions Vol1 2017 Chemistry Question 27. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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