CHEM LAB REPORT - 1 Farley Conor Farley CHM 144 A Michael...

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1 Farley Conor Farley CHM 144 A Michael Novak Ms. Deok Im-Jean Mike Eiswerth 11 October 2011 Acid in Carbonated Beverages Acid in Carbonated Beverages TRADITIONAL TITRATION : This titration began by cleaning the burette with tap water and distilled water, then allowed all the water to drain from the burette. The stopcock was turned on and off when the water was being drained, to ensure that it worked and had no leaks. The ring stand was then set up, with the burette firmly set in the burette clamp. After making sure the stopcock was closed, a clean plastic funnel was placed in the top of the burette, and 10 milliliters of 0.05 M NaOH solution was poured down the funnel, wetting all sides of the burette. This was done three times. Next, the burette was filled just above the 0.00 ml mark by pouring the NaOH solution through a dry funnel placed at the top of the burette. The concentration of NaOH solution was then recorded to three significant figures in the notebook. The funnel was then removed and placed in the trash. Then the tip of the burette was emptied of potential air bubbles by opening the stopcock partially to get the level of solution at or just below 0.00 ml. The initial volume of the solution was then recorded, which should have been between 0.00- 2.00 ml. The level of solution was measured at the meniscus. The soda was then prepared for titration, which started by using a 100 ml graduated cylinder to get the volume of 7-Up required. The actual volume of the soda was then recorded in the notebook. Next, distilled water was added to the soda to obtain a volume of liquid of 100 ml. This was then poured into the Erlenmeyer flask. Any remaining solution was rinsed out of the graduated cylinder into the Erlenmeyer flask with two washes of 5 ml. Finally, five drops of phenolphthalein indicator solution were added to the flask. The rapid initial titration was then determined by first putting the burette tip into the Erlenmeyer flask,
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2 just above the solution. NaOH solution was then added 2 ml at a time, while agitating the solution lightly. The titration was stopped upon the persistence of a light pink color. The
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This note was uploaded on 02/01/2012 for the course CHEM 141 taught by Professor Crowder during the Fall '11 term at Miami University.

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CHEM LAB REPORT - 1 Farley Conor Farley CHM 144 A Michael...

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