5.111SC | Fall 2014 | Undergraduate

Principles of Chemical Science

Unit III: Thermodynamics & Chemical Equilibrium

Lecture 22: Acid-Base Equilibrium: Salt Solutions and Buffers

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Image excerpted from Lecture 22 Notes 

  1. pH of Salt Solutions
  2. Buffers!

Lecture Video

A buffer helps to maintain a constant pH. Our blood has a natural buffering system to ensure that the pH of our blood stays within a narrow window and that we stay health. In this lecture, we consider how to design a buffer. We also discuss how one can predict the pH of a salt solution. At dinner if you put table salt in your water glass, how would the pH of the water change? or would it change?

Lecture Notes

Notes for Lecture 22 (PDF)

Clicker Questions

Lecture 22 Clicker Questions (PDF - 1.1MB)

Textbook Reading

Autoprotolysis and pH Sections 11.13 and 11.18–11.19 Sections 10.13 and 10.18–10.19
Mixed Solutions and Buffers Sections 12.1–12.3 Sections 11.1–11.3

Problems and Solutions

Problems for Lecture 22 (PDF)

Solutions for Lecture 22 (PDF)

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Course Info

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Fall 2014
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