Post Utme Lasu 2024 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2024 Post Utme Lasu Chemistry examination.

Post Utme Lasu 2024 Chemistry Objective / Multiple Choice

Question 20 POST_UTME_LASU • 2024 • CHEMISTRY • objective

A 0.5 M solution of a weak acid HA has a pH of 4.5. Calculate the value of Ka.

A. 1.0 x 10^\( -5 \)

Correct Answer B. 1.0 x 10^\( -4 \)

C. 1.0 x 10^\( -3 \)

D. 1.0 x 10^\( -2 \)

Correct Answer

Correct Option:

1.0 x 10^\( -4 \)

This is Post Utme Lasu 2024 Chemistry Question 20. It is one of the objective questions from the 2024 Post Utme Lasu Chemistry examination.

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