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Ostwald's dilution law..


Law of dilution



Wilhelm Ostwald’s dilution law is a relationship between the dissociation constant and the degree of dissociation of a weak electrolyte (acids, bases).
\mathsf{K_p = \frac{c(K^+) \cdot c(A^-)}{c(KA)} = \frac{\alpha^2}{1-\alpha} \cdot c_0}
Kpconstant of protolysis
αdegree of dissociation (or degree of protolysis)
c(A-)concentrations of anions
c(K+)concentration of cations
c0overall concentration
c(KA)concentration of associated electrolyte
Concerning conductivity, this results in the following relation:
\frac{\Lambda_c^2}{(\Lambda_0 - \Lambda_c)\Lambda_0}\cdot c = K_c
Kcconstant of dissociation
Λcequivalent conductivity
Λ0boundary conductivity
cconcentration of electrolyte