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Unformatted text preview: Polyatomic –ates, -ites, per –ates, hypo- ites and other oddities. All of these ions have oxygen in them and they all have names that end in ate. Let’s break these down into smaller groupings. First let’s consider those made from the halogens (group 7A). Fluorate, Chlorate, Bromate and Iodate. These all have the formula XO 3 1- where X is the halogen atom: F, Cl, Br, or I. Nitrate also has three oxygen atoms and a one minus charge. Carbonate has three oxygen atoms but it is different. It has a two minus charge. Here is this subset: FO 3 1- ClO 3 1- BrO 3 1- IO 3 1- NO 3 1- CO 3 2- It will help you to remember this group together. Another subgroup has four oxygen atoms: sulfate, chromate, oxalate and phosphate. Here they are: SO 4 2- CrO 4 2- C 2 O 4 2- PO 4 3- Phosphate is the only polyatomic ion that you are asked to learn with a three minus charge. Oxalate has an odd name. The others have names that tell you what atoms are in them – Oxalate has an odd name....
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This note was uploaded on 07/19/2009 for the course PSE 121 taught by Professor Walker during the Spring '09 term at City Colleges of Chicago.
- Spring '09