After extraction was performed on the tablet it was then ran through an HPLC test. After performing HPLC and using the line equation three concentrations were found as well as the three main ingredients. The three main ingredients were caffeine, aspirin, and acetaminophen. The final concentrations were 0.02 mg/mL, 0.06 mg/mL, and 0.21 mg/mL. It
ISOPENTYL ACETATE SYNTHESIS Post-Lab Submitted by Vivian M. Chan Teaching Fellow: Long Nguyen Calculations and Conclusion: In this lab, isopentyl acetate was synthesized by combining isopentyl alcohol and acetic acid. In this reaction, molecules were joined through the intermolecular elimination of water. A method of liquid extraction was used to wash the product with water, Sodium Bicarbonate and Sodium Chloride. Simple Distillation was used to retrieve a more pure product. The final crude product yield was 0.91g and the pure product yield was 0.36g.
| The variables must be controlled so the experiment is a fair test otherwise the experiment is not accurate. | 3.2 Equipment list -2m Hydrochloric Acid - 100mL beaker - Mylanta tablet -Stopwatch - Water - Bunsen burner -Gas -Tongs -Matches (light Bunsen burner) -Tongs 3.3 Safety Assessment See Risk Assessment sheet for safety hazards 3.4 Method - 20mL of Hydrochloric Acid was poured into a beaker - The 1st tablet was placed into the HCL and the time from star to finish
A majority of the impurities will remain in the solution and the main compound has been purified. Percent recovery is determined at the end of the procedure because it is not possible to recover the entire compound. To maximize the percent recovery, it is critical to use the minimum amount of the heated solvent. When choosing the solvent in this process, it is important to remember that like dissolves like, meaning that a nonpolar compound will dissolve appropriately in a nonpolar solvent, and a polar solvent will appropriately dissolve in a polar solvent. An ideal solvent for recrystallization should dissolve the entire compound once the solvent is boiling, and dissolve minimal amounts of the compound at room temperature.
Once all the water from the beaker was gone the clamp was carefully replaced so there were no air bubbles in the tube. The tube connected to the aspirator was then removed and connected to the test tube. The gelatin capsule was placed in the tube before adding 10 mL of HCl that had been measured in a graduated cylinder beforehand. The stopper was quickly and firmly placed into the test tube and the pinch clamp was removed again. After a few minutes the acid dissolved the capsule creating a black foam that then turned into a clear liquid again.
Buffers work by having molecules bind to free H+( acid) or OH- ( base) to reduce the acidity or basicity of a solution. Why are we using buffers for the pHs of 7 and 9? Buffers are being used for the pH of 7 and 9 in order to maintain a constant pH through the reactions and ensure proper functioning of the enzymes. Without buffers the pH would change and we would not get correct results for our simulated digestive system reactions. Benedicts Solution Iodine Litmus Cream Biuret Reagent What do these
These class of drugs are used to relieve pain only, they do not target inflammation like some other types of pain relievers do. Some well-known analgesics that will also be touched upon in this lab are Excedrin, Advil, Tylenol, and Bayer. In order to determine the composition of these analgesics we will be using a process known as Thin Layer Chromatography (TLC). TLC works by using a silica gel coating which is the solid adsorbent/stationary phase which is polar, and a mobile/solvent phase that is non-polar. By the process of like-dissolves-like, the non-polar product spots will be dissolved and carried with the solvent front.
Instead of this oral decongestant a diabetic might try a product that is even safe for people with high blood pressure, Coricidin HBP. This is also often kept behind the pharmacy counter. Another alternative to stuffy nose is using a neti pot (this cleans out the mucous and “junk” that accumulates in the nostrils). Saline drops or sprays also can clear up a stuffy nose. Most of you know cough syrups have sugar and alcohol components.
Hydrochloric acid was then added to the solution until the bubbles stopped in order to completely get rid of all of the zinc. Next, we used vacuum filtration to filter the copper out of the solution. We drizzled alcohol and acetone over the copper to help it dry faster. Once it appeared dry, we weighed the copper and filter paper. When we subtracted the mass of the filter paper, the mass came out to 1.312g.
Neutralization Osaji Obi 3/28/2013 Introduction The objective of this experiment is to determine the neutralization curves for weak monoprotic and polyprotic acids, and to learn potentiometric pH measurement. Pka is also needed to be determined by the equation of –log(Ka). To find that we use half neutralization and titration with a strong acid. Procedure The solution is diluted to the mark with distilled water. A burette with the standardized NaOH solution is filled.