Salicylic acid

Introduction Experiment five was a two-part experiment meant to have us practice our skills and then use those skills in actual data collection and analysis. In part one we used a sample of sodium saccharinate combined with a sample of a metal halide salt, our group used copper(II) chloride. The combination of these two samples allowed for the synthesis of a metal complex. In part two of the experiment we used a procedure similar to part one in order to collect phosphorus out of a sample of…

Acid rain is a rain that is more acidic (has more hydrogen ions) compared to normal rain and it has serious negative effects to nature and people. It is a mixture of wet and dry depositon that contain high amounts of nitric and sulfuric acids (see Figure 1). These gases come from electric generation, factories, forest fires, burning fossil fuels and acid rain forms when these gases react with water, oxygen and air. Wet deposition happens when acid chemicals fall to the ground in a rain or snow…

Conclusion: The general conclusion that I was able to produce about the effects of salt on the boiling point temperature of water is that with the addition of salt, the boiling point temperature of water increases. The results of the lab experiment do agree with my predictions and I can accept my initial hypothesis. However, I believe the data would be more consistent and solid had 2M and 4M of NaCl had been included in the experiment, rather than jumping from 1M to 3M to 5M. Discussion: For…

Introduction Pregabalin (isobutyl γ-aminobutyric acid; (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid) is an antiepileptic drug. It was authorized in 2004 in Europe and 2005 in the United States for the adjunctive treatment of partial seizures in adult epilepsy patients [1]. However, nearly all of its use is for patients with…

change occurred when hydrochloric acid was added to CaCO3 or chalk because the mixture changed to a yellow green color. In order to obtain the percent composition, a filtration system was used to separate the sand from the liquid, by straining the solid with the use of filter paper. Evaporation or heating the liquid mixture separated the liquid in the form of vapor was also used in order to get the salt alone. A chemical change also occurred when hydrochloric acid was added to the filtration…

Before beginning any of the tests the food samples were selected and separately blended in a small blender with water. This step was necessary for the food samples to fit into test tubes. Each food sample was left in a separate beaker to await the experiments. The first step of test 1a was to prepare 6 test tubes. They were labeled by what their future contents would be. The control for this experiment was a glucose standard solution; it would test positive for reducing sugars. 1.5mL of the…

The purpose of today’s lab was to determine how effective antacids are at neutralizing HCl. This experiment required us to place 3 antacids tablets into 3 Erlenmeyer flasks. Next we were required to add 50.00 mL of 0.500M HCl and five drops of phenolphthalein. Finally, we needed to titrate NaOH into the flasks. Each antacid brand required a different amount of NaOH in order for it to be completely titrated. The data collected from the experiment allowed each group to calculate the cost…

this lab, benzoic acid, benzocaine, and 9-fulorenone are isolated from a three-component mixture by using the acid-base extraction and other following types of various extraction techniques. An acid-base reaction is utilized in order to isolate the individual species from the mixture. First, in isolating the base benzocaine, proton transfers occurred via reaction with hydrochloric acid, which led to a significant shift in the polarity of the said compound, although the conjugate acid of…

Truc-Nhi Do Separation of a Mixture The purpose of this lab was to separate a mixture, calculate the percent composition by mass, and find percent error. I first started out by taking the mass of each component of the lab. I used the infiltration method to allow the salt and water solution, a blended mixture, to pass through the filtration paper and into the beaker. A trick to know if something is a solution is to see is it has the aqueous sign (aq) in the formula, like NaCl(aq). This step…

measured. 1 gm leaf sample was taken and chlorophyll a+b, carotenoids were measured (Aron, 1949). For biochemical analysis, 1 gm ground leaf sample was homogenized in 2 ml of 0.1 M ice cooled phosphate buffer containing 0.1 mM ethylenediamine tetra acetic acid and 1% (w/v) polyvinylpyrrolidone and inoculated 30 min in ice. This homogenate sample was centrifuged at 10000 rpm for 30 min at 4ºC and supernatant collected. The supernatant was assayed for Catalase (CAT), Superoxide dismutase (SOD),…