Experiment 5 Determining Ka

Experiment 5 Determining Ka - Matt Ditkoff Partner: Hannah...

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Matt Ditkoff Partner: Hannah Ayers TA: Sara Vadlamannati CHM 114 Section 5 Determining Ka 3/4/08
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Purpose of Experiment: The purpose of this experiment is to find the acid dissociation constant Ka of an acid. We also wanted to find the identity of that acid by comparing its Ka value to other acid’s Ka values. We did this by using an ICE table. Experimental Procedure: The first thing we did was to calibrate our pH meter using the pH 7 buffer. Then we got a sample of an unknown acid in a drop bottle. Then we got a sample of 0.500M NaOH in another drop bottle. Then we added 8mL of the unknown acid to a 25mL volumetric flask. Then we added 2.5mL into the same volumetric flask. Then we filled the volumetric flask with distilled water until the volume was at the 25mL line. Then we poured the volumetric flask into a 30mL beaker. Then we rinsed off the pH meter with distilled water and inserted it into the acid/base mixture and swirled it around. Then we recorded the pH level given by the pH meter. Then we rinsed the pH meter with distilled
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Experiment 5 Determining Ka - Matt Ditkoff Partner: Hannah...

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