Khan Academy (English - US curriculum)
Science & Engineering
Chemistry
Acids and bases
Acids, bases, and pH
Acids, bases, and pH
Arrhenius acids and bases
Brønsted–Lowry acids and bases
Autoionization of water
Definition of pH
Strong acid solutions
Strong base solutions
Acid strength, anion size, and bond energy
Identifying weak acids and strong acids
Identifying weak bases and strong bases
Introduction to acid–base reactions