ionic species

(noun)

chemical species with a residual charge; in acid-base equilibria, the charge resulting from the loss or addition of electrons from chemical compounds

Related Terms

  • polyprotic acids
  • equilibrium

Examples of ionic species in the following topics:

  • The Common Ion Effect

    • Whenever a solution of an ionic substance comes into contact with another ionic compound with a common ion, the solubility of the ionic substance decreases significantly.
    • This expression must always hold, even if some ionic species come from other sources.
  • Percent Ionic Character and Bond Angle

    • To answer this question, consider the data on the ionic solid LiF.
    • Think of this skewing's magnitude as the percent ionic character of a bond; to determine the percent ionic character, one must look at the electronegativities of the atoms involved and determine how effective the electron sharing is between the species.
    • The ionic bonding model is useful for many purposes, however.
    • There is nothing wrong with using the term "ionic bond" to describe the interactions between the atoms in the very small class of "ionic solids" such as LiF and NaCl.
    • Does this make an ionic bond, a covalent bond, or something in between?
  • Non-Ionic Reactions

    • With few exceptions, the multitude of reactions discussed in this and other introductory texts are classified as ionic reactions.
    • Furthermore, charged species such as carbocations, carbanions, conjugate acids and conjugate bases are often intermediates on the reaction path, the overall transformation taking place in two or more discrete steps.
    • Ionic reactions normally occur in solution, and changes in solvents may have dramatic consequences.
    • In contrast to ionic reactions, both free radical and pericyclic reactions may occur in the gas phase, as well as in solution in various solvents.
    • Also, these nonionic reactions are more tolerant of spectator functional groups than are many ionic reactions.
  • Ionic vs Covalent Bond Character

    • The bond formed between any two atoms is not a purely ionic bond.
    • The larger the difference, the more ionic the nature of the bond.
    • In the conventional presentation, bonds are designated as ionic when the ionic aspect is greater than the covalent aspect of the bond.
    • The formation of an ionic bond between lithium and fluorine to form LiF.
    • This bond is considered to have characteristics of both covalent and ionic bonds.
  • Reactive Intermediates

    • Such species are referred to as reactive intermediates, and are believed to be transient intermediates in many reactions.
    • Reactions of this kind are sometimes called ionic reactions, since ionic reactants or products are often involved.
    • Carbanions are pyramidal in shape (tetrahedral if the electron pair is viewed as a substituent), but these species invert rapidly at room temperature, passing through a higher energy planar form in which the electron pair occupies a p-orbital.
  • Ionic Bonding and Electron Transfer

    • An ionic bond results from the transfer of an electron from a metal atom to a non-metal atom.
    • An ionic bond is based on attractive electrostatic forces between two ions of opposite charge.
    • Ionic bonds involve a cation and an anion.
    • Ionic bonds differ from covalent bonds.
    • All ionic bonds have some covalent character, but the larger the difference in electronegativity between the two atoms, the greater the ionic character of the interaction.
  • Comparison between Covalent and Ionic Compounds

    • More than one electron can be donated and received in an ionic bond.
    • Some examples of compounds with ionic bonding include NaCl, KI, MgCl2.
    • Ionic compounds exist in stable crystalline structures.
    • Attraction of the oppositely charged ions is the ionic bond between Na and F.
    • Identify element pairs which are likely to form ionic or covalent bonds
  • Types of Bonds

    • Pure ionic bonding cannot exist: all ionic compounds have some degree of covalent bonding.
    • Thus, an ionic bond is considered a bond where the ionic character is greater than the covalent character.
    • Bonds with partially ionic and partially covalent character are called polar covalent bonds.
    • The boiling and melting point of covalent compounds is, in general, higher than for ionic compounds.
    • A rule of thumb is that covalent compounds are more difficult to change than ionic compounds.
  • Formulas of Ionic Compounds

    • Ionic compounds can be described using chemical formulas, which represent the ratios of interacting elements that are found in the ionic solid or salt.
    • Ionic solids are typically represented by their empirical formulas.
    • Its ionic formula is written as CaCl2, the neutral combination of these ions.
    • Cation and Anion Formation - Ionic Compounds Part 2 - YouTube
    • Generate the empirical formula of an ionic compound given its molecular constituents.
  • Ions

    • Ions are highly reactive species.
    • Periodic Properties: Part 3, Ionic Radius, Predicting Ionic Charges - YouTube
    • A continuation of the discussion of periodic properties, including ionic radius and how to predict ionic charges.
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