Trimyristin Synthesis Lab Report

This gave percent yields of 91.1% and 89.6%. These high percent yields and melting points indicate that the extraction and recrystallization performed in this experiment were successful. Introduction

This was accomplished using a reflux apparatus and methylene chloride. The nutmeg and methylene chloride were heated to dissolve the nutmeg, and to create a solution. Using a Hirsch funnel, any remaining solid pieces were filtered out of the methylene chloride and nutmeg solution. A rotary evaporator was used with 95% ethanol to secure a good recrystallization of the pure trimyristin. The precipitate was formed through heating the substance and then placing it in an ice bath.

Once the solid product was collected the mass and melting point was measured. The product was then turned into the instructor to analyze the product with 1H NMR

The percent recovery was calculated by finding the moles of the initial and final products. The moles of the initial product were found by multiplying the volume used by the density of 2-methyl-2-butanol, and then dividing by the molar mass. The percent recovery was good, showing few errors were made and that the lab went as expected. To improve the recovery, the extractions could be done even more carefully.

1 ml of water should be added to the first test tube and make a note. In the second test tube, 1 ml of methyl alcohol should be added. In the third test tube, 1 ml of hexane must be added. Lastly, the fourth test tube will be a control.

Modification: We would spend more time scraping the test tube to create crystals and be more careful with adding water so it won’t precipitating out. Conclusion: We recrystallized cream of tartar from water with 23.4 percent recovery. Answers to the post laboratory questions: 1)

We will then dissolve it in 50ml distilled water by swirling and use a 125ml volumetric flask.

Now rinse the conical flask thrice with deionised water by pumping the water around neck of the flask and swirling it. Then tip out the waste.

Pour everything in the beaker into the evaporating dish, using a Popsicle stick to scrape the sand into the evaporating dish. 5. Put the wire gauze onto the ring stand and place the evaporating dish in the center of the wire gauze, then use a striker to light the Bunsen burner with a low flame and place the Bunsen burner on the base of the ring stand under the wire gauze, once the water boils, use beaker tongs to remove the evaporating dish from the ring stand and set it on the desk, then turn off the Bunsen burner. 6. Put the filter paper in the funnel and place the funnel over the 20 ml beaker and using the beaker tongs, carefully pour the salt and water from the evaporating dish into the funnel until there is mostly sand left in the dish and wait 3 minutes for all the salt and water to go through the funnel and into the 20 ml beaker, then take the filter out of the funnel and using the first Popsicle stick scrape off the melted stearic acid onto paper towel 3.

Get a hot plate, two 50 ml Erlenmeyer flask, and a magnetic bar. Set up the hot plate under neither the fume hood and put on low heat. Using the pipettes provided, gather .4 ml of salicylaldehyde and place it in one of the 50 ml erlenmeyer flask. With the other 50 ml erlenmeyer flask add .2 ml of ethylenediamine and the magnetic stir bar. Add 10 ml of methanol to each flask, make sure that this step is completed underneath the fume hood, and swirl the mixtures thoroughly. Once completed carefully add the aldehyde solution to the flask that contains the ethylenediamine solution, this should result in a cloudy yellow color forming. Then place the flask on the hot plate that's underneath a fume hood and bring the material to a boil. Once boiling

Swirl the conical flask to mix the contents and place it in an ice-water bath.

We closed the bottle and mixed by inverting gently until the precipitate and the reagent completely dissolve. Afterwards we opened the bottle and poured 20ml of the liquid into a small flask then added 8 drops of starch indicator solution to it. We grabbed a bottle of sodium thiosulfate and grabbed the titrator (the thing that looks like a shot/needle). We stuck the tip of the titrator into the hole of the bottle of sodium thiosulfate and inverted the bottle to start filling the titrator. We made sure that the liquid in the titrator had no air bubbles then put the tip of it into the hole of the glass flask.

The organic layer was heated for approximately 30 minutes on a hot plate to try and remove the dichloromethane. Petroleum ether (1 mL) was added to a test tube and placed in an ice bath. The product from the flask was transferred to a watch glass. The 1 mL of petroleum ether was used to wash the crystals on the watch glass and was removed using a pipet.

Step 6: Using a different pipette for each solvent, add 1-mL of acetone to each test tube labeled with an A. Add 1-mL of hydrochloric acid to each test tube labeled with an H. Add 1-mL sodium hypochlorite to each test tube labeled with an S.

Test for saponin: About 2 g of the powdered sample was boiled in 20 ml of distilled water in a water bath and filtered. 10ml of the filtrate was mixed with 5 ml of distilled water and shaken vigorously for a stable persistent froth. The frothing was mixed with 3 drops of olive oil and shaken vigorously, then observed for the