Neco 2022 Chemistry Question 48

Practice objective / multiple choice question 48 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Hard Difficulty

Question 48 NECO • 2022 • CHEMISTRY • objective

A 0.250\,g sample of a monoprotic weak acid (HX) is dissolved in 50.0\,mL of water and titrated with 0.100\,M NaOH. After the addition of 20.0\,mL of NaOH, the pH is 3.80. At the equivalence point (40.0\,mL added) the pH is 8.30. Calculate the acid dissociation constant \(K_{a}\) of HX.

Correct Answer A. 1.2\times10^{-4}

B. 3.0\times10^{-4}

C. 1.2\times10^{-5}

D. 2.4\times10^{-4}

Correct Answer

Correct Option:

1.2\times10^{-4}

This is Neco 2022 Chemistry Question 48. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Hard .

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