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Unformatted text preview: Title: Determining the Molarity of a Strong Acid Experiment #3 William Matthew Speight Locker Number: J20-4 Chem 1A, Section 450, Rebecca Petit Purpose: To determine the molarity, or concentration, of the HCl solution with high precision by titration with a strong acid. Methods: First, dilute 5 mL of 5 M HCl with distilled water and fill a buret with the distilled HCl solution. A buret is used to ensure accuracy in the recording of the amount of the HCl solution used. Measure approximately .20g of TRIS and record the exact weight to four decimal places to ensure consistency in the experiments outcome. Add water to the TRIS and place the mixture into an Erlenmeyer flask, along with 5 drops of bromocresol green, to indicate when the TRIS mixture is fully titrated. Next, add the HCl solution to the TRIS mixture, constantly stirring, until the mixture turns green. Record the amount of HCl solution consumed. Then, calculate the exact molarity of the HCl solution. Repeat the process until 3 good t rials are completed within 4% error of the average of the three good...
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This note was uploaded on 03/13/2009 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.
- Spring '08