Table of Polyatomic Ions
CH3COO
or C2H3O2
ammonium
NH4
FO2
formate
+
HCOO
germanate
AsO4
3-
arsenite
AsO3
3-
barbital
arsenate
fluorite
-
GeO3
glutamate
-
2-
perchlorate
ClO4
periodate
IO4-
permanganate
C5H8NO4
-
peroxide
2-
MnO4
O2
Activity
Series
-
Li
-
peroxydisulfate S2O8
2-
PtCl6
C8H11N2O3-
hexafluorosilicate
SiF62-
phosphate
PO43-
benzoate
C6H5COO-
hydrogen carbonate
HCO3-
phthalate
C8H4O42-
bismuthate
BiO3-
pyrophosphate
P4O74-
3-
borate
BO3
hydrogen oxalate
bromate
BrO3-
carbonate
2-
Sr
Ca
Na
Am
La
Y
selenate
SeO4
silicate
SiO32-
CO32-
hydrogen phosphate HPO422hydrogen phosphite HPO3
stearate
C17H35COO-
chlorate
ClO3-
hydrogen sulfate
HSO4-
sulfate
SO42-
chlorite
ClO2-
sulfite
SO32-
Np
chromate
CrO42-
tartrate
C4H4O62-
Th
or bisulfate
C6H5O7
cyanamide
HCN-
cyanate
cyanide
dihydrogen phosphite
ferricyanide
ferrocyanide
3-
or bisulfite
TeO4
H3O+
tetraborate
B4O72-
OCN- or CNO- hydroxide
OH-
thiocyanate
SCN-
CN-
ClO-
thiosulfate
S2O32-
hydronium
hypochlorite
2-
H2PO4
-
H2PO3
-
iodate
IO3
lactate
Fe(CN)6
Fe(CN)6
4-
tripolyphosphite P3O10
MoO4
nitrate
nitrite
FeSCN
-
C3H5O3
molybdate
3-
2+
ferrorcyanate
oxalate
NO3
-
NO2
-
C2O4
-
tungstate
2-
WO4
uranate
UO4
VO3-
vandate
B
C
N
O
F
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Mg
Al
Si
P
S
Cl
0.9
1.2
1.5
1.8
2.1
2.5
3.0
K
Ca
Sc
Ga
Ge
As
Se
Br
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Sc
Pu
Be
U
Al
Ti
V
Mn
Cr
Zn
Ga
Fe
In
Na
Ti
Ce
Eu
He
Electronegativity
Mg
Cd
2-
H
Be
5-
2-
-
2.1
Li
2-
tellurate
Cr2O7
dihydrogen phosphate
HSO3-
hydrogen sulfite
citrate
dichromate
HC2O4
-
Rb
Ba
2-
hexachloroplatinate
or bicarbonate
K
0.8
1.0
1.3
1.5
1.6
1.6
1.5
1.8
1.8
1.8
1.9
1.6
1.6
1.8
2.0
2.4
2.8
Rb
Sr
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
0.8
1.0
1.3
1.4
1.6
1.8
1.9
2.2
2.2
2.2
1.9
1.7
1.7
1.8
1.9
2.1
2.5
Cs
Ba
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
At
0.7
0.9
1.3
1.5
1.7
1.9
2.2
2.2
2.2
2.4
1.9
1.8
1.8
1.9
2.0
2.2
Fr
Ra
Rf
Db
Sg
Br
Hs
Mt
Uun
Uuu
Uub
0.7
0.9
Ne
Ar
Kr
Xe
Rn
Co
Ni
Sn
Pb
H
Sb
As
Bi
Cu
Nd
Hg
La
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Ag
1.1
1.1
1.1
1.2
1.1
1.2
1.2
1.1
1.2
1.2
1.2
1.2
1.2
1.1
1.2
Ac
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Lr
Pd
1.1
1.3
1.5
1.7
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
Chemistry 11 & 12 – L. Farrell
will replace H from H2O
acetate
-
Pt
Au
Will replace hydrogen from acids only
-