Proton donors are substances that can donate a hydrogen ion (H+) in a chemical reaction, specifically in an acid-base reaction.
Bronsted-Lowry Acid: This is another term for proton donor. It's defined as any substance that can donate a hydrogen ion.
Hydronium Ion (H3O+): This is the product formed when a water molecule accepts a proton from an acid.
Acid Dissociation Constant (Ka): This measures the strength of an acid in solution, or how likely it is to donate protons.