Ammonium
+
NH
4
Cyanide
-
CN
Hydroxide
-
HO
Peroxide
2-
O
2
Acetate
-
CH CO
3 2
Oxalate
2-
C O
2 4
Nitrate
-
NO
3
Sulfate
2-
SO
4
Carbonate
2-
CO
3
Phosphate
3-
PO
4
Permanganate
-
MnO
4
Dichromate
2-
Cr O
2 7