7,8 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 baseduring 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 pointis alwaysa. 7b. <7c. > 7d. <1e. > 4blos gnoua doum oor gnibbs yd bovoutash8. Consider the Ka values for the following acids:Cyanic acid, HOCN, 3.5 x 10-4Formic acid, HCHO₂, 1.7 x 10-4Lactic acid, HC3H5O3, 1.3 x 10-4Propionic acid, HC,H,O2, 1.3 x 10-5Benzoic acid, HC₂H5O2, 6.3 x 10-5Which has the strongest conjugate base?a. HOCNb. HCHO₂ c. HCHO, d. HC,H,O,3e. HC₂H₂O₂

#7) in the titration of a weak acid with a strong base , salt of weak acid & strong base is…

Answered: 7. When a weak acid is titrated with a…

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

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

7,8

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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