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7. When a weak acid is titrated with a strong base, the pH at the equivalence point is always a. 7 b. <7 C. > 7 d. <1 e. > 4 Hq

7. When a weak acid is titrated with a strong base, the pH at the equivalence point is always a. 7 b. <7 C. > 7 d. <1 e. > 4 Hq

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.149QP: A solution of weak base is titrated to the equivalence point with a strong acid. Which one of the...
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5. If the pKa of HCOOH is 3.74 and the pH of an HCOOH/NaHCOO solution is 3.11, which of the following is TRUE? A) [HCOOH]<[NaHCOO] B) [HCOOH] = [NaHCOO] C) [HCOOH]> [NaHCOO] D) It is not possible to make a buffer of this pH from HCOOH and HCOO. 6. Which of the following is TRUE? A) The equivalence point is where the amount of acid equals the amount of base during any acid-base titration. B) At the equivalence point, the pH is always 7. C) An indicator is not pH sensitive. D) A titration curve is a plot of pH vs. the [base]/[acid] ratio. E) None of the above are true. 7. When a weak acid is titrated with a strong base, the pH at the equivalence point is always a. 7 b. <7 c. > 7 d. <1 e. > 4 blos gnoua doum oor gnibbs yd bovoutash 8. Consider the Ka values for the following acids: Cyanic acid, HOCN, 3.5 x 10-4 Formic acid, HCHO₂, 1.7 x 10-4 Lactic acid, HC3H5O3, 1.3 x 10-4 Propionic acid, HC,H,O2, 1.3 x 10-5 Benzoic acid, HC₂H5O2, 6.3 x 10-5 Which has the strongest conjugate base? a. HOCN b. HCHO₂ c. HCHO, d. HC,H,O, 3 e. HC₂H₂O₂
Transcribed Image Text:5. If the pKa of HCOOH is 3.74 and the pH of an HCOOH/NaHCOO solution is 3.11, which of the following is TRUE? A) [HCOOH]<[NaHCOO] B) [HCOOH] = [NaHCOO] C) [HCOOH]> [NaHCOO] D) It is not possible to make a buffer of this pH from HCOOH and HCOO. 6. Which of the following is TRUE? A) The equivalence point is where the amount of acid equals the amount of base during any acid-base titration. B) At the equivalence point, the pH is always 7. C) An indicator is not pH sensitive. D) A titration curve is a plot of pH vs. the [base]/[acid] ratio. E) None of the above are true. 7. When a weak acid is titrated with a strong base, the pH at the equivalence point is always a. 7 b. <7 c. > 7 d. <1 e. > 4 blos gnoua doum oor gnibbs yd bovoutash 8. Consider the Ka values for the following acids: Cyanic acid, HOCN, 3.5 x 10-4 Formic acid, HCHO₂, 1.7 x 10-4 Lactic acid, HC3H5O3, 1.3 x 10-4 Propionic acid, HC,H,O2, 1.3 x 10-5 Benzoic acid, HC₂H5O2, 6.3 x 10-5 Which has the strongest conjugate base? a. HOCN b. HCHO₂ c. HCHO, d. HC,H,O, 3 e. HC₂H₂O₂
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