Acetic anhydride

It is important to note that the goal of this experiment was to find the pKa value of bromothymol blue, a pH indicator commonly used in titrations. [UNC, 2017] The pKa is where the number of moles of acid to conjugated base are equivalent. To find this, both Beer’s Law and spectroscopy were utilized in an attempt to make graphs to show just where this value occurred. According to Sigma-Aldrich, the pKa of bromothymol blue is approximately 7.10. [SIGMA, 2017] The final pKa found experimental was…

Understanding what are Nasal Polyps? What are Nasal Polyps? Nasal polyps, also known as Nasal Polyposis are the fleshy outgrowths that develop in the lining of the nose and para-nasal sinuses which are the air-filled spaces, linked to the nasal cavity. Nasal Polyps differs in their size and can be of various colors such as yellowish-brown or pink. Generally, the nasal polyps are teardrops shaped in the beginning and takes the shape of the matured grapes grown on a stem. Nasal Polyps are…

One of the most basic currency we use has a lot of interesting properties but we never pay attention to them. This paper will be talking about those special things.everyday people have problems with dirty pennies, people with O.C.D and germaphobic relations. So it would be very useful if people knew the best way to clean them. Pennies are made up of many things, some of which react with other things that make them have special properties. The properties that make pennies dirty are “...2.5%…

Questions 1. Why are three replicate titrations done for each sample? Three titrations are performed because an error may occur in one of the titrations and getting two extra titrations can help eliminate the wrong answer. It is also a great way to practice accuracy and precision. 2. What other household products could be analyzed by titrations (suggest three)? Some other household items that could be analyzed by titrations are fruit juice, Cola beverages and household ammonia. 3. Why is it…

Name Institution Course: Instructor Date of Submission Separation (Liquid-Liquid Extraction) Lab Summary The aim of this lab was to separate a mixture of aniline, benzoic acid, and 1,4-dimethoxybenzene by the method of extraction. In this experiment, 7 ml of the mixture was used instead of 10 ml. A portion of this mixture was transferred to another flask to facilitate cooling. Afterwards, 3.5 ml of 12 M hydrochloric acid was added gradually to the mixture. A sample was obtained at a melting…

The objective of the experiment was to separate chlorophyll a and chlorophyll b and the alpha and beta conformations using the paper and column chromatography. The two techniques that were used to separate and identify the plant pigments were the paper chromatography and column chromatography. For the mixture to be separated, it must first be applied to a stationary phase. The stationary phase in the paper chromatography experiment was the filter paper. The mobile phase used in this experiment…

Task 3 P1 When using thin layer chromatography (TLC) to test for purity of aspirin it is a quick and simple method. Firstly when using the TLC method you need to have a TLC sheet and mark on the sheet 0.5cm up on the sheet and draw a line, make sure you don’t press too hard on the paper as this will disrupt the absorbent on the paper. You need to make sure the samples have been marked on the paper so you don’t get mixed up and leave a gap between the aspirin samples so they don’t run together…

Introduction An Alka seltzer is a Blood thinner and a nonsteroidal anti-inflammatory drug that can treat pain, fever, headache, and inflammation. Its two main ingredients are citric acid and baking soda. When the tablet is dropped in water, the citric acid and baking soda react, which causes the alka seltzer to dissolve. If an alka seltzer is dropped in orange juice, then it will dissolve quicker compared to water because the orange juice has a higher level of acidity. Methods For this…

The anti-benzoylecgonine (cocaine) monoclonal antibody [IP3G2] (mouse IgG1, catalog no. GTX44358, lot 821400072, 3.75 mg/ml) was purchased from Gene Tex (Irvine, CA, USA). The second anti-benzoylecgonine monoclonal antibody [IP3G2] (mouse IgG1,catalog no. MAB4029, lot 8H23323, 3.75 mg/ml) was purchased from Acris Antibodies (Herford, Germany). The secondary antibody, a polyclonal anti-mouse IgG from sheep (catalog no. R1256P, lot 21481, 2.2 mg/ml), was obtained from Acris Antibodies (Herford,…

Chalcone scaffolds had attracted many researchers to investigate their synthetic routes, potential biological activities and their roles as intermediates for naturally occurring flavanoid skeletons. This study focused on the synthesis of chalcones bearing O-, C-prenyl and chromane as substituents. The target compounds were purified by chromatographic methods and structures of all compounds were determined by using IR, NMR and MS spectroscopies. The prenylated precursors were synthesized…