Lab on Aspirin Tablets Essays

Lab on Aspirin Tablets Essays Lab on Aspirin Tablets Essay Lab on Aspirin Tablets Essay This lab was basically about finding the percentage of acetylsalicylic acid in an aspirin tablet. First, the base was created, which was made out of 1. 00 g of NaOH and D-water. Then the buret was attached to the clamp on the ring stand and the base was poured into the buret. After that, one by one, an aspirin tablet was dropped into an Erlenmeyer flask filled with 50 mL of D-water so that it could become dissolved. After the tablet was completely dissolved, a few drops of phenol were added, and the base was added very slowly, changing the color of the mixture into a pink. The flask was to be swiveled around. This was done three times, trying to get the pink color to stay for at least two minutes. Materials: * D-water * Scale * Slop beaker * Erlenmeyer Flask x3 * Volumetric Flask * Ring Stand * Buret * Buret Clamp * Phenolphthalein * NaOH * Weighing boats * Aspirin Tablets x3 * Stirring Rod * Scoopula Purpose: The purpose of this lab was to find the percentage of acetylsalicylic acid in n aspirin tablet. Theory/Intro: Aspirin possesses a number of properties that make it the most recommended drug pretty often. It is an analgesic, which means that it is very effective in pain relief. Being an anti-inflammatory agent, it is also provides some relief from the swelling associated with arthritis and minor injuries. It also reduces fever because it is an antipyretic compound. More than 40 million poun ds of aspirin are produced in the U. S. every year. This rate breaks down to about 300 tablets per year for every woman, man, and child. However, repeated use may cause gastrointestinal bleeding, and large doses can provoke a host of reactions including vomiting, diarrhea, vertigo, and hallucinations. The average dose is approximately 0. 3-1 g, but single doses of 10-30 g can be deadly. The most important compound in the synthesis of aspirin, salicylic acid, is prepared from phenol by a process discovered over 100 years ago by a German chemist Hermann Kolbe. Also known as acetylsalicylic acid, aspirin has a chemical formula of C9H8O4. Aspirin is sold over the counter and comes in many different forms. You can have white tablets to chewing gum and rectal suppositories. Also available are coated, chewable, buffered and extended release forms. Over the counter medicines like Alka-Seltzer Original Effervescent Antacid Pain Reliever, contains aspirin for pain relief. Aspirin belongs to a group of drugs called salicylates. Aspirin isn’t so easy on the stomach because it is quickly absorbed into the bloodstream and provides quick and relatively long-lasting pain relief. Aspirin also reduces inflammation. Researchers believe these effects come about because aspirin blocks the production of pain-producing chemicals which are called prostaglandins. While it does relieve pain and reduce inflammation, it also lowers fever by acting on the part of the brain that regulates temperature. The brain then sends signals to the blood vessels to widen, which allow any heat to leave the body more effectively. Procedures: 1. Make 100 mL of 0. 20M NaOH solution. 2. Find mass of one tablet. 3. Dissolve tablet in flask using, 50mL of D-water. Use a stirring rod to assist in crushing and dissolving the tablet. There should be some powdery substances on the bottom of the flask, it’s the starches put in the tablets. 4. While one partner is dissolving the tablet the other one should be setting up the buret and stand. Place the clamp on the stand. Next wash the buret with a little D-water before placing the buret on the clamp. Next fill the buret with NaOH solution up to a place above the â€Å"O† marking on the buret. Open the buret, to allow some of the base to run into a slop beaker thus filling the tip. Make sure the level of the liquid is now below the zero mark. Record the reading after filling the tip. 5. Add several drops of the indicator, phenolphthalein, to the flask. 6. Slowly add the base while swirling the flask. Continue add base until a faint pink color stays in flask. Record the value from the buret. Add a few drops more and see if the color stays and changes. You do not want a dark purple color. Record the final value of base needed. 7. Repeat the process for two more tablets, for three in total. Refill the buret after each trial. Drawing Observations: 1. The aspirin tablets were white. 2. The aspirin tablets had a smooth texture. 3. The aspirin tablets were odorless. 4. The NaOH was a frosted white color. 5. The NaOH was odorless. 6. The base was a clear color; no powdery substances were left behind. . When the NaOH was put in D-water it dissolved thoroughly leaving nothing behind. 8. When the aspirin tablets were put in D-water they took a while to dissolve. 9. When the aspirin tablets were finally dissolved, powdery substances were left behind. 10. When the base was mixed with the dissolved aspirin tablets nothing happened. 11. When the drops of phenol were added, then the mixture turn ed pink. 12. At first, the base was added to quickly so it turned into a dark pink, almost purple. 13. After swiveling the mixture a few times it would lose its pink coloring and turn back into a clear color. 4. At the second try, the base turned into a medium pink color. 15. It stood pink for a longer period of time, approximately 1 minute. 16. The mixtures for all three trials were odorless. 17. At the last try, the base was a light pink color, and it stayed for two minutes. 18. When too much base was added to the phenol/ dissolved aspirin, the mixture would turn into a dark pink. 19. When the base was added in slowly, the pink color lasted a longer time. 20. The faster the base was added, the darker the mixture got, and the longer it took to return to its original clear color. Conclusion: One source of error could’ve been that the NaOH solution that was poured into the buret wasn’t at the zero mark. This could have affected the end results because if it wasn’t at the zero mark that means that we had more liquid then needed, so when the base was poured into the phenol/dissolved aspirin mixture the recordings weren’t accurate. That means that the calculations were thrown off because the wrong amount was used. Another source of error could’ve been that when the 1. 00 g of NaOH was measured it wasn’t exact. The scale is very sensitive and maybe breathing could’ve affected the outcome. This affects our results because now there isn’t as much NaOH as there should be in the base, which could cause a difference when the aspirin and phenol are mixed with base. The color could’ve maybe stayed for longer. The last source of error could’ve been that the base was poured in too quickly from the buret, causing the color change to be off.

5 Great Part-Time Jobs for College Students

5 Great Part-Time Jobs for College Students Let’s face it: college isn’t cheap. From tuition, room and board, and books to incidentals like travel expenses, social activities and the occasional beer or two, the costs add up. You could sell your organs, but there are easier ways to make a quick buck. Not only that, but the right part-time job looks terrific on your resume and just may position you for career success after graduation. Let’s take a closer look at five of the best part-time jobs for college students. 1. College Tour GuideJust how good is this gig? USA Today actually ran an article on the many perks of being a tour guide. Not only do you get great swag and access to exclusive events and social networking opportunities, but you also have the opportunity to hone your communication skills. This practice will come in handy whether you’re delivering an in-class presentation or undergoing a job interview.The competition may be steep for these jobs, but the rewards are big, and will continue to pay off in professionalism, confidence and leadership.Even better? According to some reports, college tour guides make as much as $13/hour - not too shabby for backwards walking through the hallowed halls of your institution.2. Library/Computer Lab MonitorLove books? How about peace and quiet? If so, a library monitor position may be the ideal fit for you. Library monitors have a number of different responsibilities - from checking out books at the circulation desk to scanning, sorting and shelving them. Organization is a helpful trait for library monitors, as is helpfulness: you will likely be frequently called upon to help other students do everything from use the school computers to find information on academic topics.If library stacks feel like home to you, a library monitor job may be the perfect fit.Computer monitors and library monitors share many common responsibilities, although computer monitors should also have strong computer literacy.And while library monitors and co mputer lab monitors might not haul in the biggest bucks, they typically come with an ample amount of downtime meaning the opportunity to pursue your own studies while on the job.3. Fitness InstructorIf fitness is already a large part of your life, why not get paid for it? Whether you are devoted to your yoga practice or enjoy the energy of Zumba, university recreation centers are always on the lookout for enthusiastic talent. If you love helping people discover their own personal passion for health and fitness, this job offers the perfect opportunity to make a different while honing your leadership skills and making more than $15/hour.4. Residential AssistantToday’s employers are always on the lookout for tomorrow’s business leaders and innovators. One way to stand out from the crowd? Apply to be a residential assistant (RA).RA positions are coveted, and with good reason: not only is your room and board typically covered as compensation, but this job also gives you the tremendous opportunity to play an important role in the lives of incoming students. You will also have the chance to learn the ins and outs of everything going on around your campus while interacting with diverse people and learning valuable life skills in the process.5. TutorWherever there are students, there are people in need of some extra academic help. Whether you’re an ace at math or a whiz with the written word, there are plenty of opportunities for tutoring jobs - both on and off campus. The hours are flexible and can be done either online or in person.An added benefit? Parents are willing to fork over big bucks to help their kids succeed in in their academic studies. Tutoring is also a great way for you to revisit past materials for mastery.Get paid to share your smarts.There are many great-part time jobs for college students depending on your strengths, skills and interests. Want a jump start on finding the perfect one? Sign up for the TheJobNetwork’s Real- Time job matching, which connects job seekers with employers based on your individual needs and preferences.