<p>chem 1b isn’t the same as chem 1a. It’s the 2nd semester of general chemistry. They go into thermodynamics, electrochemistry, quantum mechanics, and cover several states including mixtures and solid. What did you get on AP Chem? If you got a 4-5, I’m sure you’ll be fine taking Chem 1B without Chem 1A. College chemistry is definitely different from AP.</p>