NaC2H3O2: Sodium acetate is a salt formed by the reaction of acetic acid (HC2H3O2) with sodium hydroxide (NaOH). It is commonly used as a food preservative.
HCl: Hydrochloric acid is a strong acid commonly found in our stomachs. It can be dangerous if not handled properly.
Kₐ: Acid dissociation constant, also known as the acidity constant. It represents the extent to which an acid donates its protons in solution.