6) The ether was removed using the rotary evaporator. We discarded the used MGSO4 into solid waste containers. The solid that remained after ether evaporated was the neutral organic compound. 7) We scraped the solid from the flask with a spatula and allowed the solid to dry thoroughly on a piece of filter
Sodium hydroxide was again drawn up using the pipette, to above the graduation mark, where the meniscus was allowed to fall until the bottom of it was rested on the graduation mark when viewed at eye level. 6. The sodium hydroxide was then run from the pipette into a conical flask where after all the liquid had run out, the tip of the pipette was touched against the bottom of the flask and withdrawn soon after. This was then repeated with the second conical flask. 7.
The third test will utilize thin layer chromatography to evaluate the purity of the aspirin as well as testing for the presence of leftover salicylic acid or other by products of the reactions. Experimental: Week 1: For the synthesis of the aspirin, 250 mL of water was boiled. 1.5 g. of salicylic acid were poured on a test tube. Then, 3.5 mL of acetic anhydride and four drops of 85% phosphoric acid were added. A cotton ball was placed to prevent vapor escape.
I lit the burner fuel, placed it under the burner stand, and placed the aluminum cup containing the alum crystals on the burner stand. I then removed and reapplied the burner fuel under the stand to avoid heating the crystals too quickly and splattering. Once the alum crystals started to boil, I then left the burner fuel under the stand and waited and watched for 8 minutes. I then removed the burner fuel, allowed the alum and aluminum cup to cool, and then weighed the mass and recorded the findings in the data table. I repeated the heating and measuring process 2 more times recording the masses in the data table.
When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette. Next, filter paper was place into the funnel and streamed with distilled water. A clean 400mL beaker is placed under the funnel and the precipitate was filtered through. When all the precipitate was filtered and removed from the beaker the residue is washed with distilled water. About 3mL of the wash water is collected in a small test tube.
Resolution of Matter into Pure Substances – Paper Chromatography Abstract The purpose of this laboratory was to determine how different substances have different solubilities in a given solvent. This was accomplished using the method of chromatography. The solubility of each substance was first determined by dropping a drop or two of each on a line drawn 2 inches above the bottom of a piece of paper. Then the paper was lightly bent in order to tape both sides of the paper leaving about a 4 centimeter gap so that the sides of the paper are not touching. The paper was then put into a beaker of a hydrochloric acid, ethanol, and butanol mixture, being sure that the paper does not touch the sides of the beaker, and then topped.
Discussion & Conclusion In this experiment we learned how to synthesize the cyclohexene by dehydration of cyclohexanol. We procedure the first step where we have to mix the components. Then we heat the R.B.F with a fractionating column, distilled water. Then we obtained the layers, and we transferred the organic layer to a small, dry Erlenmeyer flask. We added anhydrous Sodium Sulfate as a drying agent.
Once all the equipment has be gather, step one was to clean the flask because a dirty flask might have an effect on the precise mass of it. To clean the flask, I used distilled water but before I used the water, I had to get the temperature of the water by using a Thermometer according to the experiment guidelines. After getting the temperature, I used the water to clean and then I air dried it. The next side was to weight the empty flask in record the numbers on a weighted scale. After recording the empty flask, I placed the
The mixture was refluxed to avoid evaporation while it boiled for 30 minutes. After 30 minutes the mixture was cooled and then filtered through fluted filter paper into a 250ml round bottom flask. The methyene chloride dissolved the trimystrin and would pass through the filter paper leaving the other nutmeg solids behind. The solution was then distilled to get rid of the methlyene chloride and isolate the trimyristin. Methlyene chloride was a good solvent in this case because its boiling point is 40 degrees C and will boil off before the trimyristin which has a boiling point of 56-57 degrees C. Finally acetone was added to wash the crystals and the solution was vacuum filtered.
Benzophenone Harmful & Irritant Wash spillages away with water Hydrochloric acid Corrosive & Irritant wash spillages away with water. Introduction In this experiment, we will see the reduction of the aromatic ketone benzophenone with sodium borohydride to diphenylmethanol. The reducing agent is used in excess to ensure complete reduction of carbonyl group, and the reaction is carried out in aqueous ethanolic solution. The product is easily isolated, purified by crystalisation. By using TLC and IR spectrum, we will see the difference between benzophenone (starting material) and diphenylmethanol (final product).