CHM 2120 Lecture Notes - Lecture 17: Molecular Mass, Sodium Hydroxide, Dry Ice
7 Mar 2018
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Obtaining the benzoic acid (diagram obtained from lab manual): See chm 1321 introductory organic chemistry laboratory manual 2017, pages 46 47. The magnesium was in the form of small, irregularly sized chips that were shiny, silver, and metallic-looking. The cacl2 were small, circular, solid white beads. The iodine was in the form of irregularly sized bits of iodine that were not shiny but a dull grey. Once these initial reagents were added together, the solution was a caramel-colored dark brown-yellow. As it was being heated up, bubbling was present. As it was being heated up, an opaque white cloud of steam appeared to be bobbing up and down the condenser. The dry ice was a solid and a cloudy ethereal white. The hcl was a colorless liquid with a strong astringent odor. Once the dry ice and hcl was added to the initial solution, it turned into a hinderingly sticky paste that was pale neon yellow in color.
