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Ag
1+
Zn
2+
Fe (II)
2+
Fe (III)
3+
Cu (I)
1+
Cu (II)
2+
Cr
3+
Mn
2+
NH4
1+
NO3
1-
CO3
2-
SO4
2-
O2
2-
HCO3
1-
OH
1-
PO4
3-
S2O3
2-
MnO4
1-
CH3COO
1-
H
1+