5 Steps to a 5 AP Chemistry

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, 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

354  Common Ions