What is an Oxoacid? An oxoacid is a polyatomic ion plus hydrogen. Polyatomic ions are charged particles that have two or more atoms held together by covalent bonds. + POLYATOMIC ION

The oxoacids that we use in Chemistry 11 Advanced found on the nomenclature encyclopaedia deal mostly with Nitrogen, Sulfur, Phosphorous, Chlorine, Bromine and Iodine. Each of these oxyacids contain at least one hydrogen and one oxygen. This is what makes them oxoacids. The best way to remember these elements is to remember that Nova Scotians Play Cards Better Intoxicated…Nitrogen Sulfur Phosphorus Chlorine Bromine Iodine.

Hypo… …ous HClO or HOCl Hypochlorous acid HBrO or HOBr Hypobromous acid HIO or HOI Hypoiodous acid …ous (1 hydrogen) H NO 2 Nitrous acid (2 Hydrogen) H 2 SO 3 Sulfurous acid (3 Hydrogen) H 3 PO 3 Phosphorous acid HClO 2 or HO 2 Cl Chlorous acid HBrO 2 Bromous acid HIO 2 Iodous acid …ic HNO 3 Nitric acid H 2 SO 4 Sulfuric acid H 3 PO 4 Phosphoric acid HClO 3 Chloric acid HBrO 3 Bromic acid HIO 3 Iodic acid Per… …ic HClO 4 Perchloric acid HBrO 4 Perbromic acid HIO 4 Periodic acid N-NovaS-ScotiansP-PlayCl-CardsBr-BetterI- Intoxicated Look for patterns in this table that will help you remember all the oxoacids. For example, look at how the number of hydrogens increase by one in each column for nitrogen, sulfur and phosphorous.

When these oxoacids have a hydrogen in front of them they have no charge. However, when you take away the Hydrogen in front of the oxyacid, they become ionic and have a negative charge. For example, HNO 2 has no charge because it is an oxyacid, but when you take away the hydrogen it becomes NO 2 - with a charge of negative one. The number of hydrogens in front of the oxyacid determines the charge of the oxyacid. For example, phosphoric acid,H 3 PO 4, has three hydrogens in front of it. So if you were to take away the three hydrogens it would leave PO 4 -3 with a charge of negative three. This rule applies to all of the oxyacids.

H 2 CO 3 carbonic acid H 2 CrO 4 chromic acid H 3 BO 3 boric acid HCH 3 CO 2 } acetic CH 3 COOH} acid Along with the table these are a few other important acids you need to know. All the same rules apply to these oxyacids as well.

When an oxoacid losses its hydrogen and becomes ionic, its name also changes. If it’s original ending was ‘ous’ then the new ending will be ‘ite’ and if the original ending was ‘ic’ then the new ending is ‘ate’. The ACOUSITEICATE disease is a trick that can help you remember which ending goes with each other if you break it down like this: OUS  ITE IC  ATE ACOUSITEICATE -lets you know that you are dealing with the acids -this is the original ending -this is the new ending replacing the ‘ous’ -this is the original ending -this is the new ending replacing the ‘ate’

NitrogenSulfurPhosphorousChlorineBromineIodine Hypo… …ite ClO - or OCl - Hypochlorite BrO - or OBr - Hypobromite IO - or OI - Hypoiodite …ite NO 2 - Nitrite SO 3 -2 Sulfite PO 3 -3 Phosphite ClO 2 - or O 2 Cl - Chlorite BrO 2 - Bromite IO 2 - Iodite …ate NO 3 - Nitrate SO 4 -2 Sulfate PO 4 -3 Phosphate ClO 3 - Chlorate BrO 3 - Bromate IO 3 - Iodate Per… …ate ClO 4 - Perchlorate BrO 4 - Perbromate IO 4 - Periodate The other important acids: CO Carbonate Cr Chromate BO Borate

We hope this slide has helped you better your understanding of the oxoacids. Once you get the hang of it, it’s a very easy section. *Remember the easiest way to remember the oxoacids is to find your own little patterns and tricks!!! If you have to make a song, do it!!