Chapter 7 - Chapter 7 Acids and Bases Acids and Bases:...

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Unformatted text preview: Chapter 7 Acids and Bases Acids and Bases: Experimental Definitions Acids: taste sour turn litmus red react with active metals (ex. zinc) to release hydrogen gas react with bases to form water and a salt Acids and Bases: Experimental Definitions Bases: taste bitter turn litmus blue feel slippery react with acids to form water and a salt Litmus Test Announcements I have a list of those of you who turned in extra credit #2. Unfortunately, your papers were misplaced. Please turn in another copy in class as soon as you can. Sorry bout that. Chapter 7 Homework Due next Tuesday (11/20/07). Yes, there will be class that day. See WebCT for article on lead (Pb-toxic!) in wire insulator coating (PVC plastic) from China. This wiring is being used in Christmas trees. Exposure to lead is particularly worrisome for children and pets. Acids and Bases: Experimental Definitions Acids, Bases, and Salts Arrhenius Theory Acid: a molecular substance that ionizes in aqueous solution to form hydrogen ions (H + ) Acids, Bases, and Salts Arrhenius Theory Base: a substance that produces hydroxide ions (OH- ) in aqueous solution Acids, Bases, and Salts Neutralization : When an acid reacts with a base, the properties of each are neutralized and the products are water and a salt. Acid + Base Water + Salt Acids, Bases, and Salts Limitations of the Arrhenius* Theory- H + ions do not exist in water solution. Protons react with water to form hydronium ions. (H 3 O + ) H + + H 2 O H 3 O +- The Arrhenius Theory does not explain the basicity of ammonia (NH 3 contains no hydroxide) and similar compounds.- It only applies to reactions in aqueous solution. * See link to biography on WebCT Acids, Bases, and Salts Brnsted-Lowry Theory Acid: proton donor HA + H 2 O H 3 O + + A- Base: proton acceptor NH 3 + H 2 O NH 4 + + OH- Acids, Bases, and Salts Brnsted-Lowry Theory Acidic and Basic Anhydrides Anhydride means without water....
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This note was uploaded on 04/23/2009 for the course CHEMISTRY CH105 taught by Professor Armstrong during the Fall '07 term at BC.

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Chapter 7 - Chapter 7 Acids and Bases Acids and Bases:...

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