I'm a little confused on how to do the calculations. How do I do the calculations for this? Specifically the first or second calculation portion.  The theoretical number of moles of OH– needed to change the pH by one unit (refer to Appendix 7 for a sample calculation and explanation as to why moles  are being used) pHi + ∆pH = pKa + log ( mol A− + mol OH− mol HA − mol OH−

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...
icon
Related questions
icon
Concept explainers
Question

I'm a little confused on how to do the calculations. How do I do the calculations for this? Specifically the first or second calculation portion. 

The theoretical number of moles of OH– needed to change the pH by one unit
(refer to Appendix 7 for a sample calculation and explanation as to why moles 
are being used)
pHi + ∆pH = pKa + log ( mol A− + mol OH−
mol HA − mol OH−

CALCULATIONS
For each of the buffers you made, calculate the following:
1. The total number of moles of acetate ion, A-, and acetic acid, HA, initially present
in the ~20 mL buffer
2. The theoretical number of moles of OH- needed to change the pH by one unit
(refer to Appendix 7 for a sample calculation and explanation as to why moles
are being used)
pH₁ + 4pH = pka + log
mol A¯ + mol OH
mol HA mol OH
3. The actual number of moles of OH- added to change the pH by one unit using
the volume and concentration of the standardized NaOH
4. The theoretical number of moles H3O+ needed to change the pH by one unit
(refer to Appendix 8 for a sample calculation)
pH₁ - ApH
=
RESULTS
pKa + log
/mol A - mol H₂0+
mol HA + mol H3O+
5. The actual number of moles of H3O+ added to change the pH by one unit using
the volume and concentration of the standardized HCI.
Transcribed Image Text:CALCULATIONS For each of the buffers you made, calculate the following: 1. The total number of moles of acetate ion, A-, and acetic acid, HA, initially present in the ~20 mL buffer 2. The theoretical number of moles of OH- needed to change the pH by one unit (refer to Appendix 7 for a sample calculation and explanation as to why moles are being used) pH₁ + 4pH = pka + log mol A¯ + mol OH mol HA mol OH 3. The actual number of moles of OH- added to change the pH by one unit using the volume and concentration of the standardized NaOH 4. The theoretical number of moles H3O+ needed to change the pH by one unit (refer to Appendix 8 for a sample calculation) pH₁ - ApH = RESULTS pKa + log /mol A - mol H₂0+ mol HA + mol H3O+ 5. The actual number of moles of H3O+ added to change the pH by one unit using the volume and concentration of the standardized HCI.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Knowledge Booster
Ionic Equilibrium
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.
Similar questions
  • SEE MORE QUESTIONS
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