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Packet—How To Name Compounds Naming Acids : In order to explain acid naming, the sequence of HCl, HCIO, HC1O2, HCIO3, and HC10, will be ~*~ discussed in order. HCl is a:binary acid: All binary acids are named the same way: 1. the prefix "hydro" is used. 2. the'root of the anion is used. 3. the suffix "ic'is used. 4. the word "acid" is used as the second word in the name. The name for HClis hydrochloric acid. Other binary acids you are responsible for are HF, HBr, HI, and H)S. '1) HCIO is an acid involving a polyatomic ion. You MUST recognize the polyatomic ion in the formula. There is no other way to figure out the name. If you don't recognize the polyatomic, then you're sunk without a trace. The polyatomic ion is CIO” and its name is liypochlorite. Any time you see the."ite" suffix, you change it to "ous" and add the word acid. \ The name of HCIO isdiypochlorous acid. .\ _2) HC10, has the ClO.” polyatomic ion in it. The name of this ion is‘¢hlorite.’ ope Since the !'ite" suffix is used, it gets changed to |"ous." The name of 'HCIO; is chlorous acid. 3) HCIO; has the'ClO3" polyatomic ion and its name is chloraté. Any time you know the "ate" ending is used on the polyatomic, you use:"ic" when you write the corresponding acid formula. The name of HCIO3 ischlorie acid. an 4) HC10, has the ClO4” polyatomic ion and its name is perchlorate. ae Since the "ate" suffix is used, it gets changed to "ic." The name of HCIO, is'perchloric acid In the ChemTeam's estimation theré are two keys. You have to: 1. recognize when a polyatomic is present and 2. know its Ramie, , Only then can you know to change the 'lite"' suffix to "ous" and the "ate" suffix to "ic" when if is an‘acid. cows Page 4 
