Definition: A reaction in which the chemical valence increases or decreases before and after a chemical reaction

Essence: gain and loss of electrons or shift of shared electron pairs

Oxidizing agent (oxidizing) - gaining electrons - being reduced - reduction reaction - reduction product (reducing) Reducing agent (reducing property) - loses electrons - is oxidized - oxidation reaction - oxidation product (oxidizing property)

Compare: Reducibility: Agent > Product Oxidizing property: agent>product

law

single line bridge method

Displacement reactions are not necessarily all redox reactions

Metathesis reaction must not be oxidation reaction

image

Valence

Metal prices basically unchanged

Three major conservations

Steps: variable price element → non-variable price → check

four types