I
Ionization Constant
AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/527-ionization-constant
What is Ionization Constant?
The ionization constant (Ka for acids, Kb for bases) is the equilibrium constant for the ionization of a weak acid or base in water. For a weak acid HA, Ka = [H⁺][A⁻]/[HA], measuring the extent to which the acid donates protons to water. Larger values of Ka indicate stronger acids; pKa = −log(Ka) is a more convenient logarithmic scale used to compare acid strengths.
Key Facts
Term
Ionization Constant
Index
All "I" terms
Frequently Asked Questions
The ionization constant (Ka for acids, Kb for bases) is the equilibrium constant for the ionization of a weak acid or base in water. For a weak acid HA, Ka = [H⁺][A⁻]/[HA], measuring the extent to which the acid donates protons to water. Larger values of Ka indicate stronger acids; pKa = −log(Ka) is a more convenient logarithmic scale used to compare acid strengths.
More "I" Terms
Ibuprofen
C13H18O2
Ideal Gas
Ideal Gas Law
PV = nRT | R = 8.314 J/(mol·K)
Ideal Solution
Ideal solution: Raoult's law holds; ΔH_mix = 0, ΔV_mix = 0
Ideal Solution
Imidazole
C3H4N2
Indicator
Visual pH/endpoint indicator; e.g., phenolphthalein: colourless (acid) → pink (base)
Indicators
Indium
In
Indole
C8H7N
Induced Dipole
Induced dipole: α × E (α = polarisability; E = electric field)
Inert Gas
View all "I" terms →
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.