#HOCl(=O)_3"......perchloric acid", Cl(+VII)# #;pK_a~=-15#. Its salts are called #"perchlorates..."#
#HOCl(=O)_2"......chloric acid", Cl(+V)# #;pK_a~=-1#. Its salts are called #"chlorates..."#
#HOCl=O"......chlorous acid", Cl(+III)# #;pK_a=+1.96#. Its salts are called #"chlorites..."#
#HOCl"......hypochlorous acid", Cl(+I)# #;pK_a=+7.53#. Its salts are called #"hypochlorites..."#
Increasing oxygen substitution on the chlorine atom INCREASES acidity. #"Hypochlorite"# salts are the active ingredients of bleach....a potent oxidant...
#""^(-)OCl +2H^+ +2e^(-)rarr Cl^(-)+H_2O#
And of course, we also got #HCl#, #"hydrochloric acid"# with #Cl(-I)#; its salts are called #"chlorides..."#