Common Ions

Cations

100

Potassium

K⁺

200

Fe²⁺

Iron (II)

300

Silver

Ag⁺

400

Hg²⁺

Mercury (II)

500

Ammonium

NH₄⁺

Anions 1

100

Nitrate

NO₃^-

200

CO₃^2-

Carbonate

300

Peroxide

O₂^2-

400

Perchlorate

ClO₄^-

500

Hydrogen Phosphate

HPO₄^2-

Anions 2

100

OH^-

Hydroxide

200

Chromate

CrO₄^2-

300

HCO₃^-

Bicarbonate

400

Hypochlorite

ClO^-

500

MnO₄^-

Permanganate

Anions 3

100

SO₄^2-

Sulfate

200

Nitrite

NO₂^-

300

ClO₃^-

Chlorate

400

Manganate

MnO₄^2-

500

Acetate

C₂H₃O₂^-

Anions 4

100

Chlorite

ClO₂^-

200

SO₃^2-

Sulfite

300

Phosphate

PO₄^3-

400

SiO₃^2-

Silicate

500

Cr₂O₇^2-

Dichromate