1. Know these acids.
C2H3O2H acetic acid
H2CO3 carbonic acid
HClO3 chloric acid
HClO2 chlorous acid
HCN hydrogen cyanide
HClO hypochlorous acid
HNO3 nitric acid
HNO2 nitrous acid
HClO4 perchloric acid
H3PO3 phosphoric acid
H2SO4 sulfuric acid
H2SO3 sulfurous acid

2. HClO
hypochlorous acid
H3PO4
phosphoric acid
sulfurous acid
H2SO3
perchloric acid
HClO4
HNO3
nitric acid
carbonic acid
H2CO3
acetic acid
C2H3O2H
hydrogen cyanide
HCN
sulfuric acid
H2SO4
chloric acid
HClO3
chlorous acid
HClO2
nitrous acid
HNO2