Polyatomic Ions - Chandler-Gilbert Community College

- 

Acetate C2H3O2 - 

Aluminate AlO2 - 

Azide N3 Bicarbonate 

- 

HCO3 - 

Bisulfate HSO4 Bromate 

Bromite 

- 

BrO3 - 

BrO2 - 

Chlorate ClO3 - 

Chlorite ClO2 - 

Chromite CrO2 Cyanate 

Cyanide 

OCN - 

CN - 

- 

Dihydrogen Phosphite H2PO3 Dihydrogen Phosphate H 2PO 4 

- 

Formate CHO2 Hydrogen Carbonate 

- 

HCO3 Ammonium 

+ 

NH4 Hydronium 

H3O + 

Ferrocyanide 

Pyrophosphate 

+1 CHARGE 

-4 CHARGE 

4- 

Fe(CN) 6 

4- 

P2O7 -1 CHARGE 

- 

Polyatomic Ions 

- 

Hydrogen Sulfate HSO4 - 

Hydrogen Sulfite HSO3 Hydroxide 

Hypobromite 

Hypochlorite 

Hypoiodite 

Iodate 

OH - 

BrO - 

ClO - 

IO - 

- 

IO3 - 

Iodite IO2 - 

Nitrate NO3 - 

Nitrite NO2 - 

Perbromate BrO4 - 

Perchlorate ClO4 - 

Periodate IO4 Permanganate 

- 

MnO4 - 

Superoxide O2 Thiocyannate 

SCN - 

3- 

Arsenate AsO4 Arsenite 

3- 

AsO3 3- 

Borate BO3 Ferricyanide 

Hypophosphite 

Phosphate 

Phosphite 

-3 CHARGE 

3- 

Fe(CN) 6 

3- 

PO2 3- 

PO4 3- 

PO3 Reprint with permission only: Chandler - Gilbert Community College Learning Center 

2- 

Carbide C2 2- 

Carbonate CO3 Chromate 

2- 

CrO4 Dichromate 

2- 

Cr2O7 2- 

Disulfate S2O7 Disulfide 

Hexaflourosilicate 

2- 

S2 2- 

SiF6 2- 

Hydrogen Phosphite HPO3 2- 

Hydrogen Phosphate HPO4 2- 

Manganate MnO4 2- 

Metasilicate SiO3 2- 

Molybdate MoO4 2- 

Oxalate C2O4 Peroxide 

2- 

O2 2- 

Selenate SeO4 Silicate 

Sulfate 

Sulfite 

Tartrate 

2- 

SiO3 2- 

SO4 2- 

SO3 2- 

C4H4O6 2- 

Thiosulfate S2O3 Tungstate 

-2 CHARGE 

2- 

WO4 Common Weak Acids 

Acetic Acid HC 2H 3O 2 

+ 

Ammonium NH4 Hydroflouric Acid HF 

Phosphoric Acid H3PO4 Strong Acids 

Chloric Acid HClO 3 

Hydrobromic Acid HBr 

Hydrochloric Acid HCl 

Hydroiodic Acid HI 

Nitric Acid HNO 3 

Perchloric Acid HClO4 Sulfuric Acid H2SO4 Strong Bases 

Barium Hydroxide 

Calcium Hydroxide 

Ba(OH) 2 

Ca(OH) 2 

Cesium Hydroxide CsOH 

Lithium Hydroxide LiOH 

Potassium Hydroxide KOH 

Rubidium Hydroxide RbOH 

Sodium Hydroxide NaOH 

Strontium Hydroxide Sr(OH) 2

Acetate 

- 

C2H3O2 Aluminate 

- 

AlO2 Ammonium 

+ 

NH4 Arsenate 

3- 

AsO4 Arsenite 

3- 

AsO3 Azide 

- 

N3 Bicarbonate 

- 

HCO3 Bisulfate 

- 

HSO4 Borate 

3- 

BO3 Bromate 

- 

BrO3 Bromite 

- 

BrO2 Carbide 

2- 

C2 Carbonate 

2- 

CO3 Chlorate 

- 

ClO3 Chlorite 

- 

ClO2 Chromate 

2- 

CrO4 Chromite 

- 

CrO2 Cyanate 

OCN - 

CN - 

Cyanide 

Dichromate 

2- 

Cr2O7 Dihydrogen Phosphate 

- 

H2PO4 Dihydrogen Phosphite 

- 

H2PO3 Polyatomic Ions 

Disulfate 

2- 

S2O7 Disulfide 

2- 

S2 Ferricyanide 

3- 

Fe(CN) 6 

Ferrocyanide 

4- 

Fe(CN) 6 

Formate 

- 

CHO2 Hexaflourosilicate 

2- 

SiF6 Hydrogen Carbonate 

- 

HCO3 Hydrogen Phosphate 

2- 

HPO4 Hydrogen Phosphite 

2- 

HPO3 Hydrogen Sulfate 

- 

HSO4 Hydrogen Sulfite 

- 

HSO3 Hydronium H3O + 

Hydroxide 

Hypobromite 

Hypochlorite 

OH - 

BrO - 

ClO - 

IO - 

Hypoiodite 

Hypophosphite 

3- 

PO2 Iodate 

- 

IO3 Iodite 

- 

IO2 Manganate 

2- 

MnO4 Metasilicate 

2- 

SiO3 Reprint with permission only: Chandler - Gilbert Community College Learning Center 

Molybdate 

2- 

MoO4 Nitrate 

- 

NO3 Nitrite 

- 

NO2 Oxalate 

2- 

C2O4 Perbromate 

- 

BrO4 Perchlorate 

- 

ClO4 Periodate 

- 

IO4 Permanganate 

- 

MnO4 Peroxide 

2- 

O2 Phosphate 

3- 

PO4 Phosphite 

3- 

PO3 Pyrophosphate 

4- 

P2O7 Selenate 

2- 

SeO4 Silicate 

2- 

SiO3 Sulfate 

2- 

SO4 Sulfite 

2- 

SO3 Superoxide 

- 

O2 Tartrate 

2- 

C4H4O6 SCN - 

Thiocyannate 

Thiosulfate 

2- 

S2O3 Tungstate 

2- 

WO4

Polyatomic Ions - Chandler-Gilbert Community College

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