{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Andrade_Experiment1

Andrade_Experiment1 - Chem Francisco Andrade 262L...

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

View Full Document Right Arrow Icon
Chem 262L Francisco Andrade Separation of Components from a Mixture Purpose: The purpose of this experiment is to use solvent-solvent extraction to separate organic components from a mixture. Balanced Chemical Equation: R OH OH- O + R O O - + H 2 O R O O - + H 2 SO 4 R OH O + HSO4 - The acid component in the organic solution is converted by a base into a water-soluble salt in the first reaction, so it can dissolve in the aqueous phase and separate from the impurities. In the second reaction, the acid is regenerated by treating the solution with sulfuric acid. Procedure: From 0.5 to 1.0 g of the unknown material was measured and recorded, as well as the number of the unknown. The solid was transferred into an Erlenmeyer flask, and 15 mL ether and 15 mL 5% NaOH were added and swirled. The solution was poured into a separatory funnel and swirled and vented for two minutes. The two layers were allowed to separate and the aqueous layer was drained out into a clean Erlenmeyer flask. The ether layer was extracted again with 10 mL 5% NaOH for two minutes, and the resulting aqueous layer was added to the flask with the first aqueous layer. The ether layer was removed and set aside to evaporate. The aqueous extracts were combined and rinsed into the separatory funnel with 10 mL ether and 5 mL water, and swirled and vented for two minutes. The aqueous layer was removed and transferred to a clean Erlenmeyer flask, and was allowed to cool in an ice-water bath for five minutes. Ten milliliters of H
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