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Ionic Bonding Continued: Acids. Ionic Bonding Continued - Acids. What is an acid? Ionic compounds that give off hydrogen ions when dissolved in water Tend to be corrosive Taste sour Conduct electricity Have their own unique naming system. Acid Structure.
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Ionic Bonding Continued - Acids • What is an acid? • Ionic compounds that give off hydrogen ions when dissolved in water • Tend to be corrosive • Taste sour • Conduct electricity • Have their own unique naming system
Acid Structure Have a characteristic formula structure: “HX” • Where “H” is a hydrogen cation • Where “X” is an anion • So generally, if you see a formula for an ionic compound that starts with an “H” it is likely an acid
Naming Acids • Scenario 1 – The anion ends in the suffix “ide” • Add the prefix “hydro” to the anion • Change the suffix to “ic” • Add the word “acid” to the end • i.e. HF hydrogen & fluoride • hydrofluoric acid • i.e. HCN hydrogen & cyanide • hydrocyanic acid
Examples • Name the following compounds • Hɪ • H3P • H2S • HF • Write the formula for the following compounds • Hydrobromic acid • Hydroselenic acid • Hydroxidic acid
Naming Acids • Scenario 2 – The anion ends with the suffix “ate” • Change the suffix of the anion to “ic” • Add the word “acid” to the end • Note: no need for the “hydro” prefix • Hint to remember – “If you ATE it, its Icky” • i.e. HNO3 hydrogen & nitrate • nitric acid • i.e. H2SO4 hydrogen & sulfate • Sulfuric acid
Examples • Name the following compounds • H2CO3 • HClO4 • H2Cr2O7 • CH3COOH or HC2H3O2 • Write the formula for the following compounds • Chloric Acid • Oxalic Acid • Permanganic Acid
Naming Acids • Scenario 3 – The anion ends with the suffix “ite” • Change the suffix on the anion to “ous” • Add the word “acid” to the end • Note: no need for the “hydro” prefix • i.e. HNO2 hydrogen & nitrite • nitrous acid • i.e. H2SO3 hydrogen & sulfite • sulfurous acid
Examples • Name the following compounds • H2SO3 • HNO2 • HClO2 • Write the formula for the following compounds • Hypochlorous acid • Phosphourous acid
Writing Acid Formulas • Use the prefix/suffix combinations to figure out the anion • Balance the charges with a H+ cation (s) • Write the formula • i.e. – permanganic acid • permanganate anion MnO4- • HMnO4