Post Utme Unilag 2018 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2018 Post Utme Unilag Chemistry examination.

Post Utme Unilag 2018 Chemistry Objective / Multiple Choice
Question 20 POST_UTME_UNILAG • 2018 • CHEMISTRY • objective

A 1.0 M solution of a weak acid (HA) was mixed with a 1.0 M solution of a strong base (NaOH). The resulting solution had a pH of 4.5. What is the value of the acid dissociation cons\tant (Ka) for the weak acid?

Answer Options

Correct Answer A. \( 1.0 \times 10^{-4} \)
B. \( 1.0 \times 10^{-5} \)
C. \( 1.0 \times 10^{-6} \)
D. \( 1.0 \times 10^{-7} \)
Correct Answer
A
Correct Option:
\( 1.0 \times 10^{-4} \)

About This Question

This is Post Utme Unilag 2018 Chemistry Question 20. It is one of the objective questions from the 2018 Post Utme Unilag Chemistry examination.

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