What rule is observed when naming an oxyacid that does have oxygen in its formula?

An oxyacid with two less oxygen atoms than the (root) ic acid is named by writing hypo-, then the root of the name for the element other than hydrogen and oxygen, then - ous, and then acid. Therefore, HClO, is hypochlorous acid

Anion name and Acid name

Formula Anion Anion name Acid Name

HF F - is fluoride hydrofluoric acid

HCl Cl - is chloride hydrochloric acid

HBr Br - is bromide hydrobromic acid

HI I

- is iodide hydroiodic acid

H2S S2 - is sulfide hydrosulfic acid

HNO2 NO2 is nitrite nitrous acid

HNO3 NO3

-

is nitrate nitric acid

HC2H3O2 C2H3O2

-

is acetate acetic acid

H2SO4 SO4

2 - is sulfate sulfuric acid

H2CO3 CO3

2 - is carbonate carbonic acid

H3PO4 PO4

3 - is phosphate phosphoric acid

HClO ClO¯ is hypoclorite hypochlorous acid

HClO2 ClO2¯ is chlorite chlorous acid

HClO3 ClO3¯ is chlorate chloric acid

HClO4 ClO4¯ is perchlorate perchloric acid

HIO3 IO3¯ is iodate iodic acid

HNO2 NO2¯ is nitrite nitrous acid

H2SO3 SO3

2 - is sulfite sulforous acid

HCN CN is cyanide hydrocyanic acid