Purified water

and the reaction was heated in a 50℃ water bath. The reaction mixture was heated and stirred for 5 minutes until the salicylic acid dissolved. The mixture was set aside to cool down to room temperature and crystallize in the beaker. Afterwards 6 mL of cold deionized water was added to the crystals (aspirin). The crystals were separated from the mixture through vacuum filtration using a Hirsch funnel. The mixture was washed with 0.5 mL of cold deionized water and the aspirin product was…

into an ester by combining with an alcohol and removing a water molecule. Esters are found in numerous natural products, including fruits, flowers, and spices. Carboxyllic esters contribute to the flavor of products; therefore, esters are often found in artificial flavorings. This experiment uses glacial acetic acid in excess because it is relatively inexpensive and it is easy to remove from the reaction mixture because it contains no water,…

The two major substances that the caffeine was separated from are cellulose and tannins. Due to the insolubility of cellulose in water, it was easily extracted. Tannins are soluble in water but were neutralized with sodium carbonate to produce water-soluble salts. Caffeine is soluble in methylene chloride which allowed separation of tannins from caffeine because water-soluble salts are insoluble in methylene chloride. The experimental melting point observed in the results above show that…

Chitin is the second most abundant natural polysaccharide consisting of β(1→ 4)-linked N-acetyl-D-glucosamine (GlcNAc) units in a linear form. Chitin is insoluble in water and mainly exists in two crystalline (α- and β-) forms. The α-chitin consists of sheets of tightly packed alternating parallel and antiparallel chains (1) and is abundant in the exoskeleton of arthropods, insects, fungi, and yeast cell walls. The chains are arranged in parallel orientation in β-chitin (2), which occurs less…

In the production process, the polymer plastic will has Polyvinyl chloride toxic can cause serious pollution of air, water and land. Cycle can affect the natural environment. ScienceDirect, Global Environmental Change, Volume 23 Issue 6, December 2013, Page1852-1861,“Natural cycles” in lay understandings of climate changeLinda H. Connor, Nick Higginbothamb Available at: http://www.sciencedirect.com/science/article/pii/S0959378013001088 [Accessed 1 April 2017] Natural cycles are the center of…

substance desired to be extracted while not dissolving or dissolving in only small portions the other substance not wanted purified out. It should also be easy to separate from the compound left in it after purification of the other so that complete purification can take take place4. This is why diethyl ether was used because it is a hydrocarbon, meaning it is mostly insoluble in water and satisfies the requirements discussed.…

identify an unknown sample by preforming classification tests such as: Bisulfite test, Schiff’s test, and Idoform test. Also, to confirm the identity of the unknown by melting point, IR spectroscopy, and 1H NMR. For the solubility test, 1 mL of deionized water was placed in a test tube. A few drops of the of the unknown was added to the test tube and mixed with a pipette. After a few minutes, the unknown was determined to be insoluble. Next, the Schiff’s test was conducted by adding 2 mL of…

Not Just Water “In advertising not to be different is virtually suicidal.” Bill Bernbach said this about advertising. If every ad were the same products would all be seen as the same. That is not what a company wants from their advertisements. They want the advertisements to help show why their product is different from the competitors. Whether that is how the product makes you feel or how the product can benefit you. Advertisements also strive to be different so they can appeal to different…

person’s thinking is done, where most great ideas have come to be. The water relaxes you, eases your mind and washes away your worries ‘til you have finally been made new once again. Water has that effect on people. It has a literal sense of washing away the day’s dirt and grime, but at the same time, it’s a rather great symbol. Purity, reflection, renewal, intuition, life, these are just a small handful of implicit ideas that water symbolizes. Mandy Hubbard’s tragic romance novel, that covers…

liberation of nitrogen oxide gases. A total of 0.10 grams of purified benzil was produced from this reaction which contained a detected melting point of 82°C and a 34 % yield. This seemed to be approximately 10 degrees less than the ideal melting point of 94°C, which could be interpreted as deficiency of purity. The infrared spectroscopy, support this reasoning because shows a peak at 3316.65 cm-1, that appears to be a residues of water. This means that during the drying of the crystals on the…