Khan Academy
Khan Academy: Relationship Between Ka and Kb
Learn about the relationship between Ka and Kb, and pKa and pKb. See examples of finding Ka of a weak acid given Kb of the conjugate base. [11:20]
Khan Academy
Khan Academy: Ka and Acid Strength
Learn how to write an equilibrium expression for an acid-base reaction and how to evaluate the strength of an acid using Ka. [9:18]
Khan Academy
Khan Academy: Weak Acid Equilibrium
A quick overview of Ka and pKa. See an example of calculating the pH of a weak acid solution. [9:31]
Khan Academy
Khan Academy: Weak Base Equilibrium
A quick overview of Kb and pKb with examples of calculating the pH of a weak base solution. [11:22]
Khan Academy
Khan Academy: Acid Base Properties of Salts
Study examples of different kinds of neutralization reactions, and analyze the pH of the resulting salt solution. [7:33]
Khan Academy
Khan Academy: P H of Salt Solutions
See some examples of calculating pH of 0.25 M solution of sodium acetate, and calculating the pH of 0.050 M solution of ammonium chloride. [14:15]
Khan Academy
Khan Academy: Introduction to Buffers
An introduction to buffer systems, which regulate pH in blood. [6:20]
Khan Academy
Khan Academy: Buffers, the Acid Rain Slayer
Define buffers and their compositions, and learn about carbonate buffering systems in nature, acid rain, pH of buffers, and titration. See an experiment using indicators to showcase just how awesome buffers are. [10:51]
Khan Academy
Khan Academy: Common Ion Effect and Buffers
See an example of calculating the pH of solution that is 1.00 M acetic acid and 1.00 M sodium acetate using ICE table. Also shown is another example of calculating pH of a solution that is 0.15 M ammonia and 0.35 M ammonium nitrate. [13:19]
Khan Academy
Khan Academy: Buffers and Henderson Hasselbalch
Get an intuitive understanding of buffers using le Chatelier's principle, a derivation of the Henderson-Hasselbalch equation. [14:55]
Khan Academy
Khan Academy: Buffer Solution P H Calculations
See examples of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH. [11:38]
Khan Academy
Khan Academy: P H and P Ka Relationship for Buffers
How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa. [7:50]
Khan Academy
Khan Academy: Buffer Capacity
Learn the definition of buffer capacity, and see an example showing why it depends on the absolute concentrations of the conjugate acid and base. [10:44]
Khan Academy
Khan Academy: Ways to Get a Buffer Solution
This tutorial describes the two main situations where you get a buffer: making a buffer for a specific pH by combining a weak acid and a salt containing the conjugate base, and using a neutralization reaction by combining a weak acid and...
Khan Academy
Khan Academy: Titration Introduction
Introduction to acid-base titrations using example of titrating 20.0 mL of HCl of unknown concentration with 0.100 M NaOH. Covers indicators, endpoint, equivalence point, and calculating the unknown concentration. [8:50]
Khan Academy
Khan Academy: Titration Calculation Example
An example of titrating a strong acid, hydrochloric acid, with a strong base barium hydroxide. Learn how to calculate the unknown concentration when you don't have a 1:1 molar ratio of H+ to OH-. [7:50]