Oxoacids and Oxoanions

sulfuric acid
H2SO4
nitric acid
HNO3
carbonic acid
H2CO3
chloric acid
HClO3
phosphoric acid
H3PO4
phosphate
PO43-
carbonate
CO32-
chlorate
ClO3
chromate
CrO42-
cyanide
CN
dichromate
Cr2O72-
dihydrogen phosphate
H2PO4
bicarbonate (hydrogen carbonate)
HCO3
hydrogen phosphate
HPO42-
hydrogen sulfate
HSO4
hydroxide
OH
periodate
IO4
iodate
IO3
iodite
IO2
hypoiodite
IO
iodic acid
HIO3
iodous acid
HIO2
hypoiodous acid
HIO
periodic acid
HIO4
oxoacid

  • HYDROGEN + [non-metal “CENTRAL ELEMENT”] + OXYGEN 
  • Gaseous and Aqueous forms have same name*
  • When formed with Cl, Br, or I it follows this pattern:
    • per   -ic acid  –from–>  per-   -ate anion
    •       -ic acid  –from–>         -ate anion
    •      -ous acid  –from–>         -ite anion
    • hypo -ous acid  –from–>  hypo-  -ite anion
  • When formed with other central elements, may not have as many forms.
*cf binary acids, for example:
  HCl(g)  Hydrogen chloride
  HCl(aq) Hydrochloric acid

binary acid

  • HYDROGEN + [ANION]
  • In gaseous form, use rules for naming anions
  • In aqueous form, add hydro-   -ic acid

E.g.

 

H2S(g)  – hydrogen sulfide

H2S(aq) – hydrosulfuric acid

 

perchloric acid
HClO4
chlorous acid
HClO2
x

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