The buret was cleaned with distilled water at a minimum of two times During

The buret was cleaned with distilled water at a

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the waste beaker. The buret was cleaned with distilled water at a minimum of two times. During this the stopcock was checked to ensure that there were no leaks. Using a clean beaker approximately 100 mL of 0.05 M sodium hydroxide (NaOH) solution was collected. After assuring that the stopcock was closed a clean dry plastic funnel was used to add 5 mL to 10 mL 2
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of 0.05 M NaOH solution to the buret, while carefully rotation the buret to ensure the walls are completely wet with the NaOH solution. The solution was then drained into the waste beaker, ensuring that the inside of the buret was rinsed with the titrant solution. The process of rinsing the buret with NaOH was repeated two more times, to make sure the walls were well rinsed. With the stopcock closed, and with a clean, dry plastic funnel the buret was filled above the o.oo mL mark. The funnel was then removed and air bubbles were removed from the tip of the stopcock by quickly opening and allowing a small amount of the NaOH solution to flow through. The level of naOH was adjusted to be around 0.00 mL or within 0.00mL to 2.00mL. A LabQuest device was acquired and using a solution known to have a pH of 7.0, the LabQuest device was calibrated. Using a utility clamp the pH electrode was was suspended and the “Events with Entry” mode was selected for this experiment. 40 mL of 7UP plus 60 mL of distilled water was placed into a 250mL beaker to act as the citric acid and placed underneath the tip of the buret, this beaker was then placed on a magnetic stir plate with a clean stir bar within the beaker. The pH electrode was ensured to be about 3cm from the bottom of the beaker and clear of the stir bar. The stir plate was turned on and adjusted to a moderate speed before the start of the titration, using the LabQuest device the initial volume was recorded, as well as in the student’s notebook as a backup. The NaOH solution was quickly added until the stirred beaker reached a pH of around 6.0, at this point the pH and volume was recorded. The NaOH solution was continued to be introduced to the 7UP in a dropwise manner from this point forward, recording the volume of titrant as well as the pH around every 0.1-0.2 pH units of change observed. This procedure was
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