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EDTA definitions

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  • Hexaprotic Acid
    A molecule containing six acidic hydrogens, each capable of being lost as a proton depending on the solution's pH.
  • pKa
    A numerical value indicating the acidity of a specific hydrogen atom, with lower values signifying stronger acidity.
  • Carboxyl Group
    An acidic functional group in organic molecules, contributing to lower pKa values and higher acidity.
  • Amine Group
    A basic functional group in organic molecules, associated with higher pKa values compared to carboxyl groups.
  • Deprotonation
    The process where a proton is removed from a molecule, often influenced by the solution's pH relative to pKa.
  • Basic Form
    The fully deprotonated state of a molecule, predominant at high pH and optimal for forming metal complexes.
  • Neutral Form
    A molecular state with no net charge, often preferred for storage and transport in solution.
  • Metal Complex
    A structure formed when a ligand binds to a metal ion, often stabilized by multiple donor atoms.
  • Formation Constant
    An equilibrium constant quantifying the stability of a metal-ligand complex, with higher values indicating stronger binding.
  • Conditional Formation Constant
    A modified equilibrium constant accounting for the fraction of ligand in its reactive form at a specific pH.
  • Ligand
    A molecule or ion that donates electron pairs to a metal ion, forming a coordinate bond in a complex.
  • Equilibrium
    A dynamic state where the rates of forward and reverse reactions are equal, resulting in constant concentrations.
  • Ionic Strength
    A measure of the total concentration of ions in solution, affecting the stability of complexes.
  • Fractional Abundance
    The proportion of a specific molecular form present in a mixture, often dependent on pH and pKa values.
  • Charge
    The net electrical property of a molecule or ion, determined by the balance of protons and electrons.