1/20
Nitrite
2/20
Sulfate
3/20
Cyanide
4/20
Hydrogen Carbonate
5/20
Perchlorate
6/20
Nitrate
7/20
Hydroxide
8/20
Dichromate
9/20
Chromate
10/20
Sulfite
11/20
Permanganate
12/20
Chlorite
13/20
Carbonate
14/20
Hypochlorite
15/20
Ammonium
16/20
Hydrogen Phosphate
17/20
Acetate
18/20
Phosphate
19/20
Dihydrogen Phosphate