AP CHEM: Redox

reduction reaction

subtance gains electrons

oxidation reaction

substance loses electrons

OILRIG

oxidation is loss reduction is gain

ionic

transfer of electrons between nonmetal and metal

element by themselves oxidation number

0

monoatomic ion oxidation number

charge number

oxygen’s oxidation number (when in compound)

-2

hydrogen’s oxidation number (when bonded to anything else)

+1

flourine’s oxidation number

-1

halogen’s oxidation number

-1

halogens

fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

total oxidation =

zero/charge

steps for half reactions:

1) write balanced form

2) write reduced form

3) write oxidized form