This project was preformed to supply Libretext authors with videos on General Chemistry topics which can be used to enhance their projects. Also, these videos are meant to act as a learning resource for all General Chemistry students . Video Topics This video discusses how to calculate the pH of a polyprotic acid. Polyprotic acids: Have more than one ionizable H atoms H 2 S, H 2 CO 3 , H 3 PO 4 , H 2 SO 4 , H 2 SO 3 Link to Video Polyprotic Acids: https://youtu.be/y7DTjgrcP-0 Attribution Prof. Steven Farmer ( Sonoma State University )