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Lab Experiment 8

Lab Experiment 8 - Procedure B pH of Buffer Solutions PART...

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Tanisha Billups Experiment 8 March 26, 2008 Hydrolysis of Salts and pH of Buffer Solutions Purpose: The purpose of this lab is to learn the concept of hydrolysis and become familiar with acid-base indicators and the behavior of buffer solutions. Procedure A: Hydrolysis of Salts 1. Boil 450mL of distilled water for 10mins 2. Allow water to cool to room temperature 3. Add 5mL of distilled water to 6 test tubes 4. Add 3 drops of a different indicator to each test tube 5. Record the colors 6. Determine the pH of the water and record 7. Empty the test tubes and rinse with 3mL of boiled distilled water 8. Pour 5mL of boiled distilled water into each test tube 9. Add 3 drops of each indicator to each test tube 10.Record the colors and determine the pH 11.Empty the test tubes and rinse with 3mL of boiled distilled water 12.Repeat steps 1-11 for each solution
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Unformatted text preview: Procedure B: pH of Buffer Solutions PART 1 1. Weigh 3.5g NaC2H3O2(3H2O) and record 2. Add it to 150mL beaker 3. Using 10mL graduated cylinder measure 8.8mL 3.0M acetic acid and add to beaker 4. Measure 55.6mL of distilled water and add to beaker 5. Stir until all sodium acetate has dissolved 6. Measure pH of buffer solution and record 7. Save solution for part 2 PART 2 8. Pour 32mL of buffer solution into another 150mL beaker 9. Label 2 beakers 10.Pipet 1.0mL of 6.0M HCl into beaker 1 11.Mix, measure pH, and record 12.Remember to rinse between pH measurements 13.Pipet 1.0mL of NaOH into beaker 2 14.Mix, measure pH, and record Solution Ion expected to hydrolyze Spectator ion(s) Solutio n Meth yl orang e Meth yl Red Bromo-thymo l Blue Pheno l Red Phenolp h-thalein Alizari n Yellow-R pH [H + ] [OH + ]...
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