Redox Chemistry

Single displacement

________ (replacement) reactions: redox reactions in which an ion in solution is displaced (or replaced) via the oxidation of a metallic element.

Reduction

________: gain of electrons.

Balance charge

________ by adding electrons.

The sum of the oxidation number in a polyatomic ion equals

the charge on the ion.

The sum of the oxidation numbers for all atoms in a molecule must be

zero.

Oxidation number

________ (or oxidation state) of an element in a compound: the charge its atoms would possess if the compound was ionic.

Oxidation

loss of electrons

Reduction

gain of electrons

Reducing agent

is oxidized; LOSES electrons, and its charge goes up

Oxidizing agent

is reduced; gains electrons, and its charge goes DOWN

Oxidation number (or oxidation state) of an element in a compound

the charge its atoms would possess if the compound was ionic

Single-displacement (replacement) reactions

redox reactions in which an ion in solution is displaced (or replaced) via the oxidation of a metallic element

Write the two individual half-reactions

the oxidation and the reduction