5 Steps to a 5 AP Chemistry 2019

380 ❯ Common Ions

Formula Name Ion Ion name

H 3 PO 4 phosphoric acid PO 43 - phosphate ion

H 2 CO 3 carbonic acid CO 32 - carbonate ion

HMnO 4 permanganic acid MnO 4 - permanganate ion

HCN hydrocyanic acid CN- cyanide ion

HOCN cyanic acid OCN- cyanate ion

HSCN thiocyanic acid SCN- thiocyanate ion

HC 2 H 3 O 2 acetic acid C 2 H 3 O 2 - acetate ion

H 2 C 2 O 4 oxalic acid C 2 O 42 - oxalate ion

H 2 CrO 4 chromic acid CrO 42 - chromate ion

H 2 Cr 2 O 7 dichromic acid Cr 2 O 72 - dichromate ion

H 2 S 2 O 3 thiosulfuric acid S 2 O 32 - thiosulfate ion

H 3 AsO 4 arsenic acid AsO 43 - arsenate ion

H 3 AsO 3 arsenous acid AsO 33 - arsenite ion

Oxyhalogen Acids

Formula Oxy name Ion Ion name

HClO hypochlorous acid ClO- hypochlorite ion

HClO 2 chlorous acid ClO 2 - chlorite ion

HClO 3 chloric acid ClO 3 - chlorate ion

HClO 4 perchloric acid ClO 4 - perchlorate ion

Br or I can be substituted for chlorine Cl. F may form hypofluorous acid and the

hypofluorite ion.

Other Ions

Ion Ion name

O 22 - peroxide ion

OH- hydroxide ion

HSO 4 - bisulfate ion; hydrogen sulfate ion

NH 4 + ammonium ion

O 2 - superoxide ion

HCO 3 - bicarbonate ion; hydrogen carbonate ion

HPO 42 - hydrogen phosphate ion

H 2 PO 4 - dihydrogen phosphate ion

Ligands

Ligand Formula (abbreviation) Ligand name

Bromide ion Br- bromo

Carbonate ion CO 32 - carbonato

Chloride ion Cl- chloro

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