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Formula Sheets
/ Chemistry
Chapter 9
Redox Reactions
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Oxidation number
Balancing and titrations
Oxidation number
oxidation
=
loss of electrons (ON increases)
;
reduction
=
gain (ON decreases)
Rules
F
=
−
1
;
O
=
−
2
(
peroxide
−
1
,
OF
2
+
2
)
;
H
=
+
1
(
metal hydride
−
1
)
;
∑
ON
=
charge
Balancing and titrations
n-factor
n
-factor
=
change in ON per formula unit
;
KMnO
4
:
5
(
acid
)
,
3
(
neutral
)
,
1
(
strong base
)
;
K
2
Cr
2
O
7
:
6
Equivalence
N
1
V
1
=
N
2
V
2
;
meq of oxidant
=
meq of reductant
Ionic Equilibrium
Hydrogen