Orgo1 - Organic Chemistry Lab I Report Experiment titles:...

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

View Full Document Right Arrow Icon
Organic Chemistry Lab I Report Experiment titles: Recrystallization of acetanilide One-base extraction Distillation of cyclohexane Outline of experiment: For the recrystallization of acetanilide experiment, we begin the experiment with a sample of impure acetanilide crystals. These crystals are placed in a test tube and were allowed to dissolve in water over flameless heat. The test tube is then allowed to cool in a beaker, and several minutes later is allowed to cool in an ice-water bath. It is in the ice- water bath that the crystals reformed after stirring the sample for a bit, which is suggested in the manual if crystals failed to form. Vacuum filtration is then applied, and a Buchner funnel was used. We then carefully transfer the acetanilide crystals to a watchglass to dry for one week. For the one-base extraction experiment, we begin with a mixture of naphthalene and benzoic acid. Diethyl ether is added to this mixture in order to separate the aqueous layer from the organic layer. We then extract the aqueous layer while leaving the organic layer in the tube and allow to dry out using crystals of sodium sulfate (Na 2 SO 4 ). These crystals are then transferred to a watchglass to dry. The naphthalene is weighed by subtraction. We measure the aqueous layer by adding hydrochloric acid (HCl) to it until the litmus paper (originally blue) turn red and crystals began to form. They are cooled in an ice-bath in a filter by vacuum filtration. We then transfer the crystals to a watchglass to dry for a week. For the distillation of cyclohexane experiment, we beginn with a sample of impure cyclohexane. The sample is distilled with a microscale apparatus over flameless heat. As the sample begins to boil, vapor is produced and condensed into a separate part of the apparatus. We record the amount of cyclohexane that is distilled. We also recor the amount of cyclohexane that is distilled, and the temperature at which the cyclohexane distilled. Purpose of experiment: The purpose of the recrystallization experiement was to become familiar with the technique of purifying an impure sample, as well as to become familiar with vacuum filtration. The purpose of the one-base extraction was to observe the separation of organic and aqueous layers, while applying the proper technique of identifying and extracting the
Background image of page 1

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

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

Page1 / 5

Orgo1 - Organic Chemistry Lab I Report Experiment titles:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online