Homework Help is Here – Start Your Trial Now!
Science
Chemistry
PROBLEM SOLVING 1 AND 2 ONLY

PROBLEM SOLVING 1 AND 2 ONLY

Chemistry
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...
See similar textbooks
icon
Related questions
Question
100%

PROBLEM SOLVING 1 AND 2 ONLY

logarithm of a ratio which can be solved by performing the antilogarithm of pH/pKa: 10pH-pKa [base] An example of how to use the Henderson-Hasselbalch equation to solve for the pH of a buffer solution is as follows: 1.What is the pH of a buffer solution consisting of 0.0350 M NH3 and 0.0500 M NH4+ (Ka for NH4+ is 5.6 x 10-10)? The equation for the reaction is: NH+ H+ + NH3 Assuming that the change in concentrations is negligible, in order for the system to reach equilibrium, the Henderson- Hasselbalch equation will be: |NH: %3D ['HN 0.0350 1301+vd = Hd pH = 9.25 +log ( '0.0500 %3D pH = 9.095 Activity3. True or False! Directions: Write T if the statement is correct and F if otherwise. Write your answer before the number. 1. If the buffer is made with a base and its conjugate acid, the pH can be adjusted using a weak acid like HCl. 2. A buffer's pH changes greatly when a small amount of strong acid or base is added to it. 3. A good buffer mixture should have about equal concentrations of both of its components. 4. The strength of a weak acid (buffer) is usually represented as an equilibrium constant. 5.The Henderson-Hasselbalch equation connects the measurable value of the pH of a solution with the theoretical value pKa. Activity 4. It's Solving Time! Directions: Solve the following problem. Write your complete solutions. 1. What is [H3O'] in a solution of 0.25 M CH3CO2H and 0.030 M NACH3CO2? CH3CO2H(aq)+H2Om=H30°(aq)+CH3CO2 (ag) 2. What is [OH] in a solution of 0.125 M CH3NH, and 0.130 M CH3NH3CI? CH3NH2(aq)+H2Ou=CH3NH3 (aq)+OH (aq) K=1.8x105 (be) Kp=4.4x10 (be) Processing questions: 1. Why is understanding of the concept of pH important? 2. Why are buffer solutions relevant to life? Page | 5
Transcribed Image Text:logarithm of a ratio which can be solved by performing the antilogarithm of pH/pKa: 10pH-pKa [base] An example of how to use the Henderson-Hasselbalch equation to solve for the pH of a buffer solution is as follows: 1.What is the pH of a buffer solution consisting of 0.0350 M NH3 and 0.0500 M NH4+ (Ka for NH4+ is 5.6 x 10-10)? The equation for the reaction is: NH+ H+ + NH3 Assuming that the change in concentrations is negligible, in order for the system to reach equilibrium, the Henderson- Hasselbalch equation will be: |NH: %3D ['HN 0.0350 1301+vd = Hd pH = 9.25 +log ( '0.0500 %3D pH = 9.095 Activity3. True or False! Directions: Write T if the statement is correct and F if otherwise. Write your answer before the number. 1. If the buffer is made with a base and its conjugate acid, the pH can be adjusted using a weak acid like HCl. 2. A buffer's pH changes greatly when a small amount of strong acid or base is added to it. 3. A good buffer mixture should have about equal concentrations of both of its components. 4. The strength of a weak acid (buffer) is usually represented as an equilibrium constant. 5.The Henderson-Hasselbalch equation connects the measurable value of the pH of a solution with the theoretical value pKa. Activity 4. It's Solving Time! Directions: Solve the following problem. Write your complete solutions. 1. What is [H3O'] in a solution of 0.25 M CH3CO2H and 0.030 M NACH3CO2? CH3CO2H(aq)+H2Om=H30°(aq)+CH3CO2 (ag) 2. What is [OH] in a solution of 0.125 M CH3NH, and 0.130 M CH3NH3CI? CH3NH2(aq)+H2Ou=CH3NH3 (aq)+OH (aq) K=1.8x105 (be) Kp=4.4x10 (be) Processing questions: 1. Why is understanding of the concept of pH important? 2. Why are buffer solutions relevant to life? Page | 5
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Tools in Analytical Chemistry
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
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS