dissociation constant
- noun
- /ˌdɪsəʊsiˈeɪʃən ˈkɒnstənt/
- Specialized
:
constante de disociación
- A lower dissociation constant suggests that the compound remains mostly intact rather than dissociating into ions.
- acid dissociation constant
Examples
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To calculate the dissociation constant, one must measure the concentrations of the compound and its dissociated ions at equilibrium.
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The dissociation constant of the compound indicates how readily it separates into ions in solution.
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In terms of the acid-dissociation constants of the species involved, this can be written as
Academic text (2001) -
is defined as the negative base-10 logarithm of the acid dissociation constant.
Academic text (2001) -
OK, so dissociation constants or affinity constants?
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So this Ssra tagged protein needs to bind to clip X and that binding is associated with some dissociation constant or KD here, right?
Synonyms
A number that shows how much a weak acid or base separates into ions in water
A number showing the amount of products compared with reactants when a chemical reaction stops changing
Surface Forms
Morphology
The term is compositionally built from 'dissociation' (splitting of molecules) + 'constant' (a fixed numerical value), so a learner who knows both constituents can infer it is a fixed value that quantifies dissociation (i.e., an equilibrium measure). Although technical, the meaning follows regular noun compounding patterns used in scientific vocabulary and is therefore predictable from the parts.
Etymology
The term dissociation constant gives a simple picture: dissociation means coming apart and constant is a fixed number that measures how easily that happens. So a small 'dissociation constant' means a pair stays together well and a large one means they fall apart easily.
