4. When 0.050 mol of NaOH is added to 0.100 mol of an unknown weak acid, the pH was found to be 4.2. Which of the following can be the acid? (A) Chlorous acid (B) Nitrous acid K₂=1 x 10-² K₁ = 4 x 104 K₁ = 6 x 10-5 10-8 (C) Benzoic acid (D) Hypochlorous acid K₂=4 × Ka

4. When 0.050 mol of NaOH is added to 0.100 mol of an unknown weak acid, the pH was found to be 4.2. Which of the following can be the acid? (A) Chlorous acid (B) Nitrous acid K₂=1 x 10-² K₁ = 4 x 104 K₁ = 6 x 10-5 10-8 (C) Benzoic acid (D) Hypochlorous acid K₂=4 × Ka

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.71PAE: Acrylic acid is used in the polymer industry in the production of acrylates. Its K, is 5.6 X 10“’....

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Provide detailed solution and give explanation of correct and incorrect option.

4. When 0.050 mol of NaOH is added to 0.100 mol of an
unknown weak acid, the pH was found to be 4.2. Which
of the following can be the acid?
(A) Chlorous acid
K₂ = 1 × 10-²
(B) Nitrous acid
K₁ = 4 x 10-4
(C) Benzoic acid
K₁ = 6 × 10-5
(D) Hypochlorous acid K₁=4 × 10-8

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