Sodium Salt: The compound formed by replacing the acidic hydrogen ion(s) of an acid with a metal cation such as sodium ion (Na+).
Buffer Solution: A solution containing both a weak acid and its conjugate base (or a weak base and its conjugate acid), which resists changes in pH when small amounts of acids or bases are added.
Dissociation: The process where an ionic compound breaks apart into separate ions when dissolved in water. In the case of NaCH3COO, it dissociates into Na+ and CH3COO- ions.