Chemistry: An Analysis Of The Process Of Diethyl Ether

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This paper describes the process by which a three-component mixture was separated and identified. The mixture was separated with the aid of a separatory funnel and various solvents acids and bases. The compound was found to be comprised of meta-nitroaniline, naphthalene, and benzoic acid / 2-napthol. All three of them are organic compounds with melting points in the order they were listed 111-114, 79-82 and 121-122/121-123 °C. the percent yield of each component was also calculated at the end based on the initial assumption that the mixture was evenly comprised of all three components.

The unknown three-component mixture was an odorless pale powdery solid. Ether more specifically Diethyl ether commonly referred to as “ether” was an ideal solvent
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It was the dissolved in 20 mL of ether inside a beaker underneath the fume hood. It was important that this step be done under the fume hood as the solution released a volatile smelling gas. While this was happening the separatory funnel was retrieved. After checking to make sure the stopcock was closed the liquid was poured through a long stem funnel into the separatory funnel. Next still remaining under the hood 14 mL of 10% hydrochloric acid was added to the separatory funnel and the stopcock placed back on and the mixture was shaken thoroughly. During this process built up pressure need to be released periodically so the funnel was inverted and the pressured was released by moving the tap to the open position. Then the funnel was placed onto ring setup and the lower layer was drained off. Into a 125 mL Erlenmeyer flask Both layers that had formed were clear but there was a certain level of distinction between them and a clear line where the mixture separated into two distinct liquids. This Process was repeated two more times. After that 5mL of water was added to drain off any remaining traces of HCL and the drained off and combined with the three other acid …show more content…
Then the extraction process was continued this time using 14 mL of 10 % aqueous sodium hydroxide and 5 mL of water at the end once more.

RCO2H + Na+OH- → RCO2-Na+ + H20

(acidic component) (sodium salts)

The remaining ether solution was poured through the top of the funnel into a small Erlenmeyer flask. Then magnesium sulfate was added to the flask enough to cover the bottom. Then the solution was decanted into another small Erlenmeyer flask of known weight. A wooden stick was placed in the flask and the flask was placed on a steam bath. After the boiling processed was finished the flask was covered with Parafilm and set aside till next class.

Then the acidic extracts were put on ice and neutralized but cautiously adding 10% aqueous sodium hydroxide 10 mL until a precipitate was visible and the pH paper shows that the solution is alkaline. At this point the mixture was vacuum filtrated and left to dry till next

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