More Lessons for Chemistry
This is a series of lectures in videos covering topics in General Chemistry. They are conducted by Dr. Chuck Wight who teaches chemistry at the University of Utah.
This General Chemistry lecture covers ideal solutions of solvents and solutes and Raoults Law of vapor pressures for ideal solutions. We discuss the Gibbs Free Energy of solutions, and how this leads to colligative properties of freezing point depression, boiling point elevation, and osmotic pressure.
Acids and Bases
General Chemistry lecture covering the definitions of acids and bases, acid and base dissociation constants, and the self-ionization of water. We show how to calculate the pH of dilute solutions of weak acids and bases, and the concepts of conjugate acid-base pairs.
General Chemistry II lecture covering buffer solutions of acids and their conjugate bases. Buffer solutions are designed to maintain the pH of solution by reacting with small amounts of added acid or base. We show how to calculate the pH of a buffer solution using the Henderson-Hasselbalch equation, and how to select an appropriate acid-base combination to prepare a buffer solution at any desired pH.
General Chemistry lecture covering the use of titration for measuring the concentration of acid or base, and definitions of the end point and equivalence point of a titration. We explain the use of acid-base indicators for detecting the end point of a titration and how to compute the pH of solution at any point during a titration.
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