The degree of dissociation can then be calculated from the ICE tables at the top of the page for the dissociation of N 2 O 4 (g): K p = 4 α 2 1 − α 2 (p t o t) 0.323 a t m = 4 α 2 1 − α 2 (1.00 a t m) Electrolyte Power Compounds that completely dissociate is characterized by α>30% and is called strong electrolytes. The degree of dissociation α may be calculated for any concentration c of the electrolyte using the equation where f± is the mean activity coefficient of the electrolyte (see alsoOSTWALD DILUTION LAW). Electrolyte characterized by 3<α<30% is medium electrolyte. If the degree of dissociation is α<3% than electrolyte is called weak electrolyte. The degree of dissociation (α) of a weak electrolyte ,A x B y is related to van't Hoff factor (i) by the expression 17 The classical theory of electrolytic dissociation is applicable only to dilute solutions of weak electrolytes. The degree of dissociation `(alpha)` of a weak electrolyte, `A_(x)B_(y)` is related to van't Hoff's factor `(i)` by the expression:

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