Chemistry Essay Examples Page 33

Vitamin C is an essential nutrient that can be found in various foods and is also produced as dietary supplements by chemical companies. It plays a crucial role in treating scurvy and is widely utilized in the cosmetics industry due to its antioxidant properties. However, many individuals, including medical professionals, are unaware of the dual…

The purpose of this experiment is to see if vanillin can be synthesized to vanillyl alcohol through reduction with sodium borohydride. If the mixture does not dissolve after 5 minutes of continuous stirring add another 5 mL NaBH4 and cool the solution to just below 15°C. In a small beaker dissolve 12.0 mmol of NaBH4…

Polyphenol Oxidase enzyme activity can be detected by change in colour of solution, Inhibitors prevent the reaction of the enzymes with substrates, the enzyme is relatively specific. Aim: To design and conduct an experiment to demonstrate enzyme activity of Polyphenol Oxidase and Peroxidase when mixed with catechol, caffeic acid, pyrogallad, tyrosine, guacol, and water, to…

Discussion In this experiment, the synthesis of p-di-tert-butyl benzene was achieved by using the Friedel-crafts Alkylation. How the purposes were or were not accomplished For this experiment, 0. 02356 grams of p-di-tertbutyl benzene were recovered. The theoretical percent yield was 0. 616 grams of the product. This gives a 38. 2% yield. The product obtained…

IntroductionIn this lab I observed the burning of a candle very closely. I found out that the candle needs oxygen to burn, that it produces carbon dioxide similar to the way that my body produces carbon dioxide, and that a candle produces water as a second waste product. I learned that if I hold an…

For my final project the first compound I synthesized was Dulcin. Dulcin is an artificial sweetening agent that is 200 times as sweet as sucrose. It is also, the second synthetic sweeter that was discovered. The first synthetic sweetener, saccharin, was discovered five years prior to Dulcin. The discovery of Dulcin occurred in 1883. Approximately…

The body uses cholesterol to make vitamin D and various hormones, such as estrogen, testosterone, and cortical. The body can produce all the cholesterol that it is needs, but it also obtains cholesterol from food. Lieberman-Bernhard test: The Lieberman-Bernhard or acetic anhydride test is used for the determination of cholesterol. The formation of a green…

Tuberculosis ( TB ) is the taking cause of decease in the universe from a bacterial infective disease. The disease affects 1. 8 billion people/year which is equal to tierce of the full universe population. In the United States TB is on the diminution. In 2007 a sum of 13. 293 instances were reported. The…

CHEMISTRY (Theory) Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70 (ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks…

VI. RESULTS AND DISCUSSION Aspirin is prepared by the esterification of salicylic acid with acetic anhydride under acidic conditions. The phenol group in salicylic acid is replaced by a carboxyl group through electrophilic substitution. The mechanism for the reaction can be summarized as follows: Figure 11.4. Mechanism for the reaction of salicylic acid and acetic…