Definition

1. Noun:
   • A chemical theory describing aqueous solutions: The "theory of dissociation" is a chemical theory that explains the behavior of substances dissolved in water. It specifically describes these solutions in terms of acids, which dissociate to produce hydrogen ions (H⁺), and bases, which dissociate to produce hydroxyl ions (OH⁻). A key tenet of this theory is that the reaction between an acid and a base produces a salt and water.

Usage Examples

• Noun:
  • The theory of dissociation provides a fundamental framework for understanding acid-base reactions in aqueous solutions.
  • According to the theory of dissociation, the strength of an acid is related to its degree of dissociation in water.

Advanced Usage

• Historical Context: The "theory of dissociation" is often associated with the work of Svante Arrhenius and is a cornerstone of classical acid-base chemistry. It is sometimes specifically referred to as the Arrhenius theory of dissociation.
  • The Arrhenius theory of dissociation was a groundbreaking advancement in physical chemistry.

Variants and Related Words

• Dissociation (n): The general process by which molecules split or separate into smaller particles, such as ions or atoms, often in response to a solvent.
  • The dissociation of sodium chloride in water produces sodium and chloride ions.
• Arrhenius theory (n): A more specific name for the theory of dissociation as proposed by Svante Arrhenius.
• Acid-base theory (n): A broader category of theories explaining acids and bases, which includes the theory of dissociation.

Synonyms

• Arrhenius acid-base theory: A direct synonym that names the scientist most associated with the theory.
• Classical dissociation theory: Emphasizes its historical position among acid-base theories.

Related Concepts (Not Phrasal Verbs or Idioms)

• Ionization: A related process often discussed alongside dissociation, involving the formation of ions.
• Electrolyte: A substance that dissociates into ions in solution, a key concept within the theory.
• Neutralization: The reaction between an acid and a base to form a salt and water, which is a central prediction of the theory of dissociation.

Noun

1. (chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions); the product of an acid and a base is a salt and water