Base Dissociation (Kb & pKb)Chemistry
Base Dissociation Constant (Kb & pKb) & Solution pH Calculator
Calculate base dissociation constant (Kb), pKb, hydroxide concentration [OH-], solution pOH, and alkaline equilibrium pH using exact quadratic ionic equilibrium.
Calculated Result
Equilibrium Solution pH
14pH
Calculator Inputs
-
Quick select:
M
Quick select:
Equilibrium Solution pH
14pH
Hydroxide Scale (pOH)
0 pOH
Hydroxide Concentration [OH-] (M)
0 M
Conjugate Acid pKa
9.25 -
Basic Equilibrium Established: Confirms weak base dissociation yielding hydroxide ions and establishing a basic pH > 7.0.
Alkaline pH vs pOH Balance
pOH Scale
0 pOH(0%)
Solution pH
14 pH(100%)
Standard analytical chemistry tool for aqueous weak base dissociation and amine equilibrium.
Calculation Methodology
pKb = -log10(Kb) and Kb = 10^(-pKb). Quadratic equilibrium: [OH-] = (-Kb + sqrt(Kb^2 + 4*Kb*C)) / 2. pOH = -log10[OH-] and pH = 14 - pOH at 25°C. Conjugate acid pKa = 14 - pKb.
Frequently Asked Questions
They satisfy the fundamental water self-ionization relation: pKa + pKb = 14 (Kw = 1.0 x 10^-14). A stronger base possesses a proportionately weaker conjugate acid.
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