Khan Academy: Bouncing Droplets: Superhydrophobic and Superhydrophilic Surfaces

This video introduces the concept of surface tension, and shows how roughness can make a surface superhydrophobic or superhydrophilic. The Wenzel and Cassie-Baxter models are explained. [8:17]

Learn the basics of surface tension and its relationship to hydrogen bonding in this video. [4:30]

Learn the basics of acids, bases, proton concentration, the pH scale, and buffers in this article.

The video lesson from Khan Academy provides a lesson for the AP Chemistry course. This video lesson explains the relationship between Ka and Kb, and pKa and pKb. Examples of finding Ka of a weak acid given Kb of the conjugate base.

Find the relationship between standard cell potential and equilibrium constant K. [5:18]

Learn about the existence of an upward force on an object equal to the weight of the fluid displaced while that object is submerged in a fluid with this video. This video will introduce students to Archimedes' principle and buoyant...

An explanation of how an element's location on the Periodic Table can help identify electron configurations and orbitals. [14:30]

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]

Introduction to Gibbs free energy. Includes information about the relationship between spontaneity and entropy, enthalpy, and temperature. [17:40]

Explanation of Gibbs Free Energy and Spontaneity. Includes formulas and examples.