Definition of dissociation constant in English:

dissociation constant

Pronunciation /diˌsōSHēˈāSHən/ /dɪˌsoʊʃiˈeɪʃən/ /diˌsōsēˈāSHən ˈkänstənt/ /dɪˌsoʊsiˈeɪʃən ˈkɑnstənt/

noun

Chemistry
  • A quantity expressing the extent to which a particular substance in solution is dissociated into ions, equal to the product of the concentrations of the respective ions divided by the concentration of the undissociated molecule.

    ‘This dissociation constant is more than 100 times less than the dissociation constant for monomeric thiazole orange.’
    • ‘The relationship among the species present in solution, however, is still governed by the dissociation constant (K a) for the weak acid, acetic acid.’
    • ‘The dissociation constant of the complex ion is written analogously.’
    • ‘The dissociation constant of phenol, on the other hand, was determined to 0.2 mM and 0.36 mM, respectively.’
    • ‘Different types of groups are allowed for, each type being characterized by a chemical dissociation constant rather than a charge.’