{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem 3A - Lab Report #5

Chem 3A - Lab Report #5 - Kylie 14 July 2010 Chem 3A Lab...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Kylie 14 July 2010 Chem 3A Lab Experiment #6 Discussion: After observing the unknown's solubility in each solvent, we decided to use water for the next step. It showed no visible solubility in acetone, water, or hexane, and it dissolved right away in ethanol; this cancelled out ethanol since its immediate dissolution showed that it wouldn't be recoverable for recrystallization. Water, however, was the only solvent that was able to dissolve the unknown when heated to its boiling point. Since water led to changes in the unknown's solubility through temperature shifts, it was the suitable solvent that would allow recrystallization. Since recrystallization purified the compound, we were able to put the recovered crystals into capillaries to test the unknown's melting point. The melting point range would be accurate since any impurities that were initially there were gone, and after obtaining the range we were able to match our unknown with one of the known compounds in our pre-lab data. The unknown's melting point range was the highest possible (~187.8 to ~189) and matched hippuric acid's (187-188). Although the melting endpoint ruled out camphoric acid and succinic acid, the solubility information helped in further confirming the accuracy of the results.The unknown and
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern