Aqua regia, or royal water in Latin, is a solvent that can dissolve solid gold and platinum into a solution. Activity nine in a series of 36 allows classes to learn, through readings and answering questions, what a solution is and the...

Solutions and their properties, solutions,concentration, etc.

This Chem4kids tutorial teaches the basic properties of solutions.

Discussion of water as a solvent. Includes material on hydrogen bonds, hydration, hydrophobic effect, acids, basses, and pH.

A chemical tutorial describes the term "aqueous" and features examples of how different substances dissolve.

This site gives a good explanation of osmosis and reverse osmosis. Also includes a scientific diagram of the process.

This site provides a basic definition of reverse osmosis, with a bit of a slant on why water pretreatment is important.