Other
Fundamentals of Reverse Osmosis
This site provides a basic definition of reverse osmosis, with a bit of a slant on why water pretreatment is important.
Sophia Learning
Sophia: The Properties of Water: Lesson 3
This lesson will provide an understanding of the chemical and physical nature of water. It is 3 of 4 in the series titled "The Properties of Water."
Curated OER
Reverse Osmosis and Osmotic Pressure What They Are
This site gives a good explanation of osmosis and reverse osmosis. Also includes a scientific diagram of the process.