WAcid
WAcid attack
WAcid–base reaction
WBrookhart's acid
WChloroauric acid
WFerulic acid decarboxylase
WHelium hydride ion
WHyaluronic acid
WHydrazoic acid
WHydrogen sulfide
WIsocyanic acid
WLewis acids and bases
WMolybdic acid
WNitrosylsulfuric acid
WOleum
WPicramic acid
WPiranha solution
WPolythionic acid
WTetrabromoauric acid
WThiophosphoric acid
WTrinitromethane