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...
Related questions
Question
pleasssseee solve question 17
![07-13: The diprotic acid H₂L has Kar 1.4 x 10% and Kaz 1.2 x 10-10
97-Calculate the molarity of H" of 0.080 M HL solution
13-107 By 4.110 C) 1.3×10 D) 4.1 × 107
08-Calculate the molarity of Lof 0.080 M H₂L solution
A) 1.4-10 B) 1.2-10° C) 14×105 D) 1.2 × 10-¹0
09- Find the pH of a solution prepared by dissolving 0.85 g of NaHL (188.1 g/mol) and 1.05 g
of NaL (194.0 g/mol) in 250.0 mL of water.
C) 7.84
B) 9.00
D) 10.0
A) 10.84
Q10- The fraction of L2 (a of L2) at pH-12.00 is
B) 0.813
A) 0.923
C) 0.992 D) 0.089
Q11- At pH=5.85
A) [HL]-(H₂L] B) [L]> [H₂L]
C) [H₂L]>[HL]
D) [L²] = [HL]
Q12- At pH=7.89
A) [H₂L]=[1²]
B) [HL]= [H₂L]
C) [H₂L]> [HL]
D) [L²] = [HL]
Q13- Find the pH of a solution prepared by dissolving 0.85 g of H₂L (166.1 g/mol) and 1.05 g of
NaHL (188.1 g/mol) in 250.0 mL of water.
A) 4.81
B) 5.89
C) 4.89
D) 5.81
Q14- A 0.100 M solution of the weak acid HA has a pH of 2.36. Calculate pK, for HA.
2.36 B) 4.01 C) 1.66 D) 3.72
Q15- Which of the following combinations would be the best to buffer the pH to 4.5?
A) H₂PO, and HPO, K₁=6.2 × 108
B) HNO₂ and NO2, K.-4.5 x 104
NH4 and NH3, K₂ = 5.7 × 10-10
D) CH3CO₂H and CH3COO, K₁= 1.8 x 10-5
Q16-Phosphoric acid (H3PO4) has pKar = 2.148, pK2=7.198, pKas = 12.375. What is the value
for HPO4²?
A) 2.37 × 10²
%
B) 4.51 x 10-¹0
C) 1.58 x 10-7
D) 1.41 x 10-¹2
Q17- Find the pH of 0.20 M ammonia (NH3, K=1.76×105)
A) 11.27 B) 10.01 C) 11.36
D) 11.12](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbccdf819-703a-40ae-b479-32ba98a4eafe%2Fd0ee8149-1e14-4305-b9d2-a5971a58be13%2Fx555bps_processed.jpeg&w=3840&q=75)
Transcribed Image Text:07-13: The diprotic acid H₂L has Kar 1.4 x 10% and Kaz 1.2 x 10-10
97-Calculate the molarity of H" of 0.080 M HL solution
13-107 By 4.110 C) 1.3×10 D) 4.1 × 107
08-Calculate the molarity of Lof 0.080 M H₂L solution
A) 1.4-10 B) 1.2-10° C) 14×105 D) 1.2 × 10-¹0
09- Find the pH of a solution prepared by dissolving 0.85 g of NaHL (188.1 g/mol) and 1.05 g
of NaL (194.0 g/mol) in 250.0 mL of water.
C) 7.84
B) 9.00
D) 10.0
A) 10.84
Q10- The fraction of L2 (a of L2) at pH-12.00 is
B) 0.813
A) 0.923
C) 0.992 D) 0.089
Q11- At pH=5.85
A) [HL]-(H₂L] B) [L]> [H₂L]
C) [H₂L]>[HL]
D) [L²] = [HL]
Q12- At pH=7.89
A) [H₂L]=[1²]
B) [HL]= [H₂L]
C) [H₂L]> [HL]
D) [L²] = [HL]
Q13- Find the pH of a solution prepared by dissolving 0.85 g of H₂L (166.1 g/mol) and 1.05 g of
NaHL (188.1 g/mol) in 250.0 mL of water.
A) 4.81
B) 5.89
C) 4.89
D) 5.81
Q14- A 0.100 M solution of the weak acid HA has a pH of 2.36. Calculate pK, for HA.
2.36 B) 4.01 C) 1.66 D) 3.72
Q15- Which of the following combinations would be the best to buffer the pH to 4.5?
A) H₂PO, and HPO, K₁=6.2 × 108
B) HNO₂ and NO2, K.-4.5 x 104
NH4 and NH3, K₂ = 5.7 × 10-10
D) CH3CO₂H and CH3COO, K₁= 1.8 x 10-5
Q16-Phosphoric acid (H3PO4) has pKar = 2.148, pK2=7.198, pKas = 12.375. What is the value
for HPO4²?
A) 2.37 × 10²
%
B) 4.51 x 10-¹0
C) 1.58 x 10-7
D) 1.41 x 10-¹2
Q17- Find the pH of 0.20 M ammonia (NH3, K=1.76×105)
A) 11.27 B) 10.01 C) 11.36
D) 11.12
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY