CHM1045 Lecture 7 Outline of Last Lecture I Molecular compounds i Example 1 ii Example 2 II Compound Outline of Current Lecture III Acids IV Naming Oxoacids and Oxoanions V Base VI Hydrates Current Lecture Acids Acid a substance that yields hydrogen ions H when dissolved in water Ex HCl gas and HCl in water Pure substance hydrogen chloride Dissolved in water H and Cl hydrochloric acid Oxoacid acid that contains hydrogen oxygen and another element HNO3 nitric acid H2CO3 carbonic acid H3PO4 phosphoric acid Naming Oxoacids and Oxoanions The rules for naming oxoanions anions of oxoacids are as follows 1 When all the H ions are removed from the ic acid the anion s name ends with ate 2 When all the H ions are removed from the ous acid the anion s name ends with ite 3 The names of anions in which one or more but not all the hydrogen ions have been removed must indicate the number of H ions present Example H2PO4 dihydrogen phosphate HPO4 2 hydrogen phosphate PO43 phosphate Example 1 Name the following oxoacid and oxoanion a H3PO3 b a Phosphorous acid b Periodate Base Base a substance that yields hydroxide ions OH when dissolved in wat NaOH sodium hydroxide KOH potassium hydroxide Ba OH 2 barium hydroxide Hydrates Hydrates compounds that have a specific number of water molecules attached to them BaCl2 2H2O barium chloride dihydrate LiCl H2Olithium chloride monohydrate MgSO4 7H2O magnesium sulfate heptahydrate Sr NO3 2 4H2O strontium nitrate tetrahydrate
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