Khan Academy: Test Prep: Mcat: Chemical Processes: Thermochemistry: Endothermic vs. Exothermic Reactions

Equip your chemistry class with the tools to properly understand endothermic and exothermic reactions. Young chemists collect, analyze, and graph data to determine how the Law of Conservation of Matter is applied to chemical...

Explains what intramolecular and intermolecular forces are and the different types for each. Includes lots of examples.

Explains the concept of chirality and how it is applied in the development of pharmaceuticals.

Explains what chromatography is and how its principles are applied when separating mixtures.

Explains what a buffer is, how it is prepared, how it works to resist drastic changes in pH, and the characteristics of an effective buffer. Human blood also contains a buffer which is crucial for maintaining the blood's pH.

Offers an explanation of Gibbs free energy using an analogy. [9:19]

An exploration of aromatic stability as it relates to benzene. [5:59]

Explains what aromatic heterocycles are. [11:49]

Enzymes create the conditions needed for biochemical reactions to happen fast. The general name that chemists use for a chemical entity that increases the speed of a reaction is a "catalyst." Enzymes are biological catalysts - they...

Explains what the Uncertainty Principle developed by Werner Heisenberg is and its applications in electron movement and in quantum mechanics. [9:38]