We were given that a good solvent for recrystalizing trimyristin was acetone. Acetone was heated on a steam bath and added to the crude trimyristin to completely dissolve it. The solution was immediately cooled so that the trimyristin crystals formed in a mother liquor of impurities. The crystals vacuum filtered through a Büchner funnel and rinsed with ice cold acetone so only the impurities dissolved and pure crystals were left in the funnel. To finish, we dried the pure trimyristin crystals using a high vacuum pump, and 0.1470g remained with a 3.674% recovery from nutmeg, and a 15.186% recovery from crude
We also used ice to see whether unknown compound will dissolve in the ice. We used 3ml of ice and 0.5 g of unknown and 1-gram sodium carbonate and 1g unknown carbonate in 10 ml H20. when we first mixed ice with unknown it melts then we used sodium carbonate and unknown carbonate it forms white precipitate. for the final test we used 1-gram sodium bicarbonate and unknown with 15 ml of H20 then it bubbles up. After we done with all other test, we like to see the PH of the sodium bicarbonate and unknown, its initial temperature is 20 and the final temperature was 24 and then PH paper turn blue and its has the PH of 8-9 and its very
This ensures that only the compound with the lower boiling point is completely condensed before the compound with the higher boiling point begins to condense. Therefore, this means that the 2-propanol has condensed completely before 1-butanol had begun to, allowing the individual boiling points to be clearly analysed. As well the product can be pure 2-propanol if the temperature is decreased before the 1-butanol begins to condense. Compared to the simple distillation, it would be difficult to identify when the two compounds would be separated from the ever-increasing temperature. In addition, if one was intending to separate compounds with close boiling points, fractional distillation would better the better distillation
Problem: How does the temperature of water used to dissolve an Alka-Seltzer tablet affect the amount of time it would take for the tablet to completely dissolve? An Alka-Seltzer tablet is a medicine tablet made with baking soda used as a pain reliever for “headaches, body aches, pain, heartburn, acid indigestion, and sour stomach” (Alka-Seltzer Tablets). It is put into water, left to dissolve and then consumed. When an Alka-Seltzer tablet is dropped into h20, a chemical reaction immediately takes place and produces bubbles made out of carbon dioxide as a product of the collision (Olson 2). When in its original powder (dry) form, the Alka-Seltzer’s two main ingredients: citric acid and sodium bicarbonate are just there and not reacting to each
At the level of the Krebs cycle, it primarily inhibits enzymes that require lipoic acid as a cofactor, such as pyruvate and alpha-ketogluterate dehydrogenase. This then inhibits the Krebs Cycle, which stops the production of reduced NAD (NADH). Therefore, arsenic poisoning kills by allosteric inhibition of essential metabolic enzymes, leading to death from multi-organ
This also showed me that you cannot drink coke and take Mentos straight afterwards because it will play around with the acids in your stomach. I chose to do this experiment because it is a very interesting experiment on how the different kinds of fizzy cold drinks react when Mentos mint is dropped inside the bottle. I
As such, that key neutralizing acid is inherent, so there's no compelling reason to incorporate an extra acidic fixing in the formula. Baking powder is accessible as single-acting preparing powder and as twofold acting preparing powder. Single-acting powders are enacted by dampness, so you must prepare formulas which incorporate this item instantly in the wake of blending. Twofold acting powders respond in two stages and can remain for some time before heating. With twofold acting powder, a few gases is discharged at room temperature when the powder is added to batter, yet most of the gas is discharged after the temperature of the mixture increments in the broiler.
This test tube lacked hydrogen peroxide in order to keep the reaction from occuring. In two test tubes labeled “Substrate”, we mixed 0.2 ml of hydrogen peroxide with 0.1 ml guaiacol and 4.7 ml of distilled water. We also labeled two test tubes “enzyme” using a glass marking pen and filled them with 1.0 ml of turnip extract and 4.0 ml of distilled water. After the test tubes were prepared, we put the blank test tube into a cuvette and put it into the spectrophotometer in order to zero it out. While one group member set the spectrophotometer to zero, another mixed one enzyme test tube with one substrate tube and observed a change in it’s color.
Basic Soda, an Essential Cleaning Solution: Basic soda is chemically sodium bicarbonate and commonly it is called the famous baking soda. It is a naturally occurring substance present in the intestine of living organism and is highly helpful in digestion and avoiding stomach disturbances as it helps living things to maintain the pH balance necessary for life and metabolism. Physically sodium bicarbonate is a white crystalline solid having no odor. It is soluble in water (93.4 g/L at 20°C and pH = 8.4) and undergoes a complete dissociation into sodium and bicarbonate ions, it is non-volatile and decomposes at temperatures greater than 50°C. Baking Soda is extracted from soda ash, also known as sodium carbonate.
While swirling the phosphoric acid solution in the Erlenmeyer flask, the sodium hydroxide solution was added to it a few drops at a time using a disposable plastic pipette. The After all the sodium hydroxide was transferred, the flask was rinsed with 2 mL of deionized water and added to the flask with the reaction mixture and swirled for an additional minute. A clean, dry evaporating dish with a watch glass was then weighed and recorded to 0.001 g. The reaction mixture was then transferred to the evaporating dish. The flask was then rinsed with 2 mL of deionized water and added to the evaporating dish containing the reaction mixture.