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Unformatted text preview: toluic acid is an irritant and toxic by ingestion. Salicylic acid is toxic by ingestion. To dispose of the unknowns, we placed them in the “Waste Experiment 2 Crystals” beaker. Also in this lab, we dealt with Bunsen burners to heat up the solutions. I was given unknown number 272. The mass of the unknown was 1.390 grams. After it was crystallized, the weight of the crystals was .91 grams. This gave me a percent recovery of 65.47%. From the Digital Melting Point Apparatus, I approximated my melting point to be 102 ° C. The melting point of o-Toluic acid is between 100 ° C and 106 ° C. I then found a mixed melting point between my unknown and o-Toluic acid at 100 ° C. I concluded that my unknown was o-Toluic acid....
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This note was uploaded on 08/15/2008 for the course CHM U212 taught by Professor Witten during the Fall '08 term at Northeastern.
- Fall '08