Teacher: Dr. Van Der Sluys

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Presentation transcript:

Teacher: Dr. Van Der Sluys Unit 7.3 Naming Acids Teacher: Dr. Van Der Sluys

Objectives Formulas of acids Naming acids

Formulas of Acids An acid is a substance that when dissolved in water, dissociates or breaks apart into a hydrogen ion (H+) and an anion. Acids always have hydrogen as the first element in the formula, HCl (aq), HNO3 (aq), H2SO4 (aq), etc.

Naming Binary Acids Binary acids contain only two elements, hydrogen and a monatomic anion whose name ends in the suffix -ide. To name a binary acid like HCl Begin the name with the prefix hydro- Next use the root of the second elements name, e.g. chlor Replace the suffix of the anion with the suffix -ic Add the word acid HCl is hydrochloric acid

Examples HF H2S HBr H2O Hydroiodic acid Hydronitric acid Hydroselenic acid

Ternary Acids Ternary acids contain three elements, with hydrogen being the first element in the formula and oxygen being the last. To name a ternary acid such as H2SO4 Remove the hydrogen ion(s) and determine the formula of the anion Replace the suffix -ate becomes -ic acid -ite becomes -ous acid H2SO4 anion SO42- sulfuric acid

Polyatomic Ions NH4+ PO43- CO32- SO42- ClO- SO32- ClO2- CN- ClO3- NO3- Have you memorized the polyatomic ions yet? NH4+ ammonium PO43- phosphate CO32- carbonate SO42- sulfate ClO- hypochlorite SO32- sulfite ClO2- chlorite CN- cynaide ClO3- chlorate NO3- nitrate ClO4- perchlorate NO2- nitrite OH- hydroxide C2H3O2- acetate

Examples HClO4 H3PO4 HNO3 HNO2 Acetic acid Hypochlorous acid Carbonic acid

Summary Binary Acids Ternary Acids Hydro ___ic acid If the anion is -ate it becomes _____ic acid If the anion is -ite it becomes _____ous acid