Unit 9 combines two big concepts: thermodynamics (whether reactions are favored) and...

Acids and bases are everywhere in chemistry and in life. Unit 8 teaches you how to identify acids...

Most chemical reactions don't go to completion. They reach a state where reactants and products...

Energy is at the heart of chemistry. Thermochemistry is the study of energy changes associated with...

Not all reactions happen at the same speed. Some are explosively fast, and others take years....

Chemical reactions are everywhere. When you burn wood, digest food, or create a battery, chemical...

Unit 3 covers the properties of substances in different states and how those properties connect to...

Unit 2 builds directly on Unit 1. Now that you understand atoms and electron configurations, it's...

Unit 1 is where AP Chemistry begins, and it's all about connecting the stuff you can measure in the...