Lewis Acids and Bases

number of species

The Lewis model greatly expands the considered to be acids.

proton

A(n) (H+) can serve as both a Brønsted- Lowry acid and a Lewis acid.

number of species

The Lewis model greatly expands the considered to be acids.

proton

A(n) (H+) can serve as both a Brønsted- Lowry acid and a Lewis acid.

central atom ligand bonds

The are coordinate covalent bonds.

lone pair of electrons

For a species to accept a proton, it must contain an atom that possesses a(n) .

Complex ions

are sometimes called coordination complexes.

Lewis acid base reaction

A(n) produces a product with a coordinate covalent bond.

The charge of the complex ion equals

the sum or the charges of the ligands and central atom.

Lewis (1923)

Less restricting model

Lewis acid

accepts a pair of electrons

Lewis base

donates a pair of electrons

Coordinate Covalent Bond (or dative bond)

a type of bond that forms when one of the atoms in the bond provides both bonding electrons

Lewis acid-base adduct

a compound that contains a coordinate covalent bond formed between a Lewis acid and a Lewis base

Complex ions

polyatomic ions that consist of a central atom, usually a transition metal surrounded by ions, or molecules called ligands

Formation constant (Kf)

The equilibrium constant for the formation of a complex ion directly from its components

The dissociation constant (Kd)

the equilibrium constant for the decomposition of a complex ion into its components in solution