Lab 6 Technical Abstract

Lab 6 Technical Abstract - OH ions accepts protons and...

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Technical Abstract Mindy McDuffie, Alan Ready, and Ms. Hye Jin Chun (T.A.) Chemistry 111, Texas A&M University, Fall 2007 Introduction In the state of Texas, there are several lignite coal mines. Texas leads the nation in coal consumption with 95% used to generate electricity. It is believed that acid rain in some parts of Texas is caused by the burning lignite. However, before a conclusion can be made it is important to understand acid base chemistry. There are several definitions of acid and base, all of which describe characteristics of acids and bases. An acid is sour, corrosive, capable of changing litmus paper from blue to red, reactive with bases, yields H+ ions, capable of donating a proton, and accepts an electron pair. A base is bitter, slippery, changes litmus paper from red to blue, yields
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Unformatted text preview: OH- ions, accepts protons, and donates electron pairs. Materials and Methods In this experiment, the various methods of determining the pH of a solution are compared. A secondary standard, NaOH will be standardized with a primary standard potassium hydrogen phthalate, KHP. After the NaOH solution is standardized, using a phenolphthalein indicator and a stir bar until the solution turns pink, titrations of NaOH with hydrochloric acid then with acetic acid are performed. Potentiometric titration of polyprotic acid with phosphoric acid and the determination of acid content in yellow mustard trials are performed. Results and Discussion Conclusion...
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