Use Acid Dissociation Fraction Calculator when you need to solve the exact dissociation fraction α of a weak acid from Ka and concentration using Cα² + Ka·α − Ka = 0. Enter Ka and Concentration using the definitions and units below so the result can be reproduced.

Ka

Ka of the weak acid; must be greater than zero.

Concentration

Initial acid concentration in mol/L; must be greater than zero.

The published tool contract uses this rule: Solve the exact dissociation fraction α of a weak acid from Ka and concentration using Cα² + Ka·α − Ka = 0.

Dissociation fraction

Fraction of acid molecules dissociated, between zero and one.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Ka and Concentration values and their units alongside the result. Percent Dissociation Weak Acid Calculator is useful when you instead need to compute monoprotic weak-acid percent dissociation by solving Ka = x²/(C-x), without assuming x is negligible relative to C. Base Dissociation Fraction Calculator provides another view by helping you solve the exact dissociation fraction α of a weak base from Kb and concentration using Cα² + Kb·α − Kb = 0.

• Percent Dissociation Weak Acid Calculator

  Compute monoprotic weak-acid percent dissociation by solving Ka = x²/(C-x), without assuming x is negligible relative to C.

• Base Dissociation Fraction Calculator

  Solve the exact dissociation fraction α of a weak base from Kb and concentration using Cα² + Kb·α − Kb = 0.

• Weak Acid pH

  Compute the ideal pH of a monoprotic weak acid by solving Ka = x²/(C-x), without the small-dissociation approximation.