Experiment 5 postlab

Experiment 5 postlab - Patrick Smith Chemistry 115 Section...

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Patrick Smith Chemistry 115 Section 6 Accuracy and Precision January 29, 2007 Lucas McElwayne Dear Mr. McElwayne, This letter is a report of last week’s lab experience. I will cover a series of information that will roughly follow the following sequence. Working by myself, I conducted an experiment of accuracy and precision to fully develop my measuring skills in the lab. I will list the lab procedure and a confirmation of the objectives. I weighed out onto a pre-folded piece of filter paper 0.5 grams of fluorescein. I then added it to the 100 mL volumetric flask. After this, I filled the remainder of the flask with water. Next would be time to use a pipet. I now used my 10 mL pipet to pipet the solution into a 250 mL Erlenmeyer flask. I did this 3 times. I then put 10 mL of HCL into each of the three flasks. A yellowish precipitate formed. I next filled the buret with 40 mL of sodium hydroxide solution. I slowly added the solution to the flasks until the precipitate had disappeared. This was done 3 times.
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