Learn how to build a ball mill for grinding solids into fine powders. Commercial ball mills can cost more than $100, but with this tutorial you'll be able to make one that works just as well for no more than $30!

This tutorial is for introductory chemistry students. Learn the five easy steps to assigning oxidation numbers to atoms in chemical formulae. Also, I will give you some problems that teachers love to give on tests because they are "tricky".

This tutorial will show you make pyrophoric iron from household chemicals. When this finely-divided form of iron is exposed to air, it spontaneously ignites.

This tutorial will give you all the sources I know of for household chemicals in the United States. This excludes chemical suppliers and ebay. A good majority of these household items are impure sources of chemicals, so in order to obtain just the desired...