15.21. What is the concentration of H3O+ ions in a 0.65 M solution of HNO₂? 15.22. What is the concentration of H₂O* ions in a solution of hydrochloric acid that was prepared by diluting 7.5 mL of concentrated (11.6 M) HCl to a final volume of 100.0 L? 15.23. What is the value of [OH-] in a 0.0205 M solution of Ba(OH)₂? 15.24 Cal
15.21. What is the concentration of H3O+ ions in a 0.65 M solution of HNO₂? 15.22. What is the concentration of H₂O* ions in a solution of hydrochloric acid that was prepared by diluting 7.5 mL of concentrated (11.6 M) HCl to a final volume of 100.0 L? 15.23. What is the value of [OH-] in a 0.0205 M solution of Ba(OH)₂? 15.24 Cal
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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I need help with 15:21 and 1523 please
![F
OH
es this
h the same
gen ions?
eactions:
5(e)
reactions:
ag) + OH (ag)
1,0* (aq)
ollowing
H₂.
15.19. What is the conjugate acid of the bisulfate ion, HSO,",
and what is its conjugate base?
*15.20. Compounds that do not ionize in water have been known
to ionize in nonaqueous solvents. In such a solvent,
what would be the conjugate acid and conjugate base of
methanol, CH,OH?
Problems
15.21. What is the concentration of H3O+ ions in a 0.65 M
solution of HNO₂?
15.22. What is the concentration of H₂O* ions in a solution of
hydrochloric acid that was prepared by diluting 7.5 mL of
concentrated (11.6 M) HCl to a final volume of 100.0 L?
15.23. What is the value of [OH-] in a 0.0205 M solution of
Ba(OH)2?
15.24. Calcium hydroxide, also known as slaked lime, is the
cheapest strong base available and is used in industrial
processes in which low concentrations of base are required.
Only 0.16 g of Ca(OH)₂ dissolves in 100 mL of water
at 25°C. What is the concentration of hydroxide ions in
250 mL of a solution containing the maximum amount of
dissolved calcium hydroxide?
pH and the Autoionization of Water
Concept Review
15.25. Explain why pH values decrease as acidity increases.
15.26. Solution A is 100 times more acidic than solution B.
What is the difference in the pH values of solution A and
solution B?
15.27. Describe a solution (solute and concentration) that has a
negative pH value.
15.28. Describe a solution (solute and concentration) that has a
negative pOH value.
*15.29. Draw the Lewis structures of the ions that would be
produced if pure ethanol underwent autoionization.
*15.30. Liquid ammonia at a temperature of 223 K undergoes
autoionization. The value of the equilibrium constant for
the autoionization of ammonia is considerably less than
that of water. Write an equatic for the autoionization of
ammonia and suggest a reason why the value of K for the
process is less than that of water.
Problems
15.31. Calculate the pH and pOH of solutions with the following
[H,O*] or [OH-] values. Indicate which solutions are
acidic, basic, or neutral.
a. [H₂O¹] = 5.3 x 10³ M
b. [H,O*]- 3.8 x 10 M
c. [H₂O*] = 7.2 x 10-6 M
d. [OH-] = 1.0 × 10-¹4 M
15.32. Calculate the pH and pOH of the solutions with the
following hydrogen ion or hydroxide ion concentrations.
Indicate which solutions are acidic, basic, or neutral.
a. [OH-] = 8.2 x 10-¹¹ M
b. [OH-] = 7.7 x 10-6 M
c. [H₂O¹] = 3.2 × 10-4 M
d. [H,O*] 1.0 × 107 M
a. [H,O'] in 8
b. [H,O'] in 6
c. [OH-] in 4.
d. [OH-] in 2.5
15.34. Determine the i
a. pH of a solum
b. pH of a solum
c. pOH of a soll
d. pOH of a sol
15.35. Calculate the pl
a. stomach acid
b. 0.00500 MH
c. a 2:1 mixture
d. a 3:1 mixture
15.36. Calculate the pH
a. 0.0450 M NaC
b. 0.160 M Ca(O
c. a 1:1 mixture o
d. a 2:3 mixture o
15.37. Calculate the pH =
15.38. Calculate the pH o
Calculations Involvi.
Concept Review
15.39. One-molar solutions
CH₂COOH, HNO-
a. Rank them in orc
b. Rank them in ord
(weakest to strong
15.40. On the basis of the fo
0.100 M solutions, sel
Acid
C6H5COOH
HF
HN3
CH3COOH
D
15.41. A 1.0 M aqueous solutic
conductor of electricity t
Explain why.
15.42. Hydrogen chloride and w
yet a solution of HCl diss
conductor of electricity. E
15.43. Hydrofluoric acid is a wea
expression for its acid ioni
15.44. Early Antiseptic The use o
acid, was pioneered in the
Lister (after whom Listerin
in surgery. Its formula is C,
is ionizable. Write the mass
ionization equilibrium of ph
*15.45. The K, values of weak acids
they dissolve. For example, t
ethanol is less than its & in](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fabf734cf-e5ce-494e-9589-3625d2d45939%2F5ccaa8a8-106b-483c-9674-a9cdf2b379eb%2Fil2987c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:F
OH
es this
h the same
gen ions?
eactions:
5(e)
reactions:
ag) + OH (ag)
1,0* (aq)
ollowing
H₂.
15.19. What is the conjugate acid of the bisulfate ion, HSO,",
and what is its conjugate base?
*15.20. Compounds that do not ionize in water have been known
to ionize in nonaqueous solvents. In such a solvent,
what would be the conjugate acid and conjugate base of
methanol, CH,OH?
Problems
15.21. What is the concentration of H3O+ ions in a 0.65 M
solution of HNO₂?
15.22. What is the concentration of H₂O* ions in a solution of
hydrochloric acid that was prepared by diluting 7.5 mL of
concentrated (11.6 M) HCl to a final volume of 100.0 L?
15.23. What is the value of [OH-] in a 0.0205 M solution of
Ba(OH)2?
15.24. Calcium hydroxide, also known as slaked lime, is the
cheapest strong base available and is used in industrial
processes in which low concentrations of base are required.
Only 0.16 g of Ca(OH)₂ dissolves in 100 mL of water
at 25°C. What is the concentration of hydroxide ions in
250 mL of a solution containing the maximum amount of
dissolved calcium hydroxide?
pH and the Autoionization of Water
Concept Review
15.25. Explain why pH values decrease as acidity increases.
15.26. Solution A is 100 times more acidic than solution B.
What is the difference in the pH values of solution A and
solution B?
15.27. Describe a solution (solute and concentration) that has a
negative pH value.
15.28. Describe a solution (solute and concentration) that has a
negative pOH value.
*15.29. Draw the Lewis structures of the ions that would be
produced if pure ethanol underwent autoionization.
*15.30. Liquid ammonia at a temperature of 223 K undergoes
autoionization. The value of the equilibrium constant for
the autoionization of ammonia is considerably less than
that of water. Write an equatic for the autoionization of
ammonia and suggest a reason why the value of K for the
process is less than that of water.
Problems
15.31. Calculate the pH and pOH of solutions with the following
[H,O*] or [OH-] values. Indicate which solutions are
acidic, basic, or neutral.
a. [H₂O¹] = 5.3 x 10³ M
b. [H,O*]- 3.8 x 10 M
c. [H₂O*] = 7.2 x 10-6 M
d. [OH-] = 1.0 × 10-¹4 M
15.32. Calculate the pH and pOH of the solutions with the
following hydrogen ion or hydroxide ion concentrations.
Indicate which solutions are acidic, basic, or neutral.
a. [OH-] = 8.2 x 10-¹¹ M
b. [OH-] = 7.7 x 10-6 M
c. [H₂O¹] = 3.2 × 10-4 M
d. [H,O*] 1.0 × 107 M
a. [H,O'] in 8
b. [H,O'] in 6
c. [OH-] in 4.
d. [OH-] in 2.5
15.34. Determine the i
a. pH of a solum
b. pH of a solum
c. pOH of a soll
d. pOH of a sol
15.35. Calculate the pl
a. stomach acid
b. 0.00500 MH
c. a 2:1 mixture
d. a 3:1 mixture
15.36. Calculate the pH
a. 0.0450 M NaC
b. 0.160 M Ca(O
c. a 1:1 mixture o
d. a 2:3 mixture o
15.37. Calculate the pH =
15.38. Calculate the pH o
Calculations Involvi.
Concept Review
15.39. One-molar solutions
CH₂COOH, HNO-
a. Rank them in orc
b. Rank them in ord
(weakest to strong
15.40. On the basis of the fo
0.100 M solutions, sel
Acid
C6H5COOH
HF
HN3
CH3COOH
D
15.41. A 1.0 M aqueous solutic
conductor of electricity t
Explain why.
15.42. Hydrogen chloride and w
yet a solution of HCl diss
conductor of electricity. E
15.43. Hydrofluoric acid is a wea
expression for its acid ioni
15.44. Early Antiseptic The use o
acid, was pioneered in the
Lister (after whom Listerin
in surgery. Its formula is C,
is ionizable. Write the mass
ionization equilibrium of ph
*15.45. The K, values of weak acids
they dissolve. For example, t
ethanol is less than its & in
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