Preparation of Fruit Flavors (Pear) Abstract. In this experiment an assigned Ester is prepared‚ particularly n-Propanol. The Preparation was done via Fischer reaction. In this reaction‚ a reflux set-up is required. The reflux set-up was used in the liquid-liquid extraction. After adding an immiscible solution to the compound containing n-Propanol‚ the mixture now will have two layer: the Organic and Aqueous layer. The organic layer is the extract needed and its % yield is computed resulting to
Premium Acetic acid Ester Carboxylic acid
CO2H OH salicylic acid 2g 0.014 mole O O O CH3 H2SO4 ethyl acetate CO2H O O acetyl salicylic acid acetic acid CH3 O + H3C + H3C OH acetic anhydride 5 mL 0.05 mole The limiting reagent is salicylic acid. The theoretical yield of acetyl salicylic acid is 2.52 g. Physical Data:* mp MW salicylic acid 157-9˚ 138 acetyl salicylic acid 135-6˚ 180 acetic anhydride — 102 acetic acid — 60 sulfuric acid — 98 ethyl acetate — 88 *Data from the CRC‚ 70th ed. bp — — 138˚ 117-8˚ — 77˚
Premium Acetic acid Aspirin
* Acetone * Sodium Nitroprusside Test – Test for presence of acetone * -Wine red solution * Iodoform Test – Test for Methyl Ketones * Acetone – positive * Ethyl methyl ketone – positive * Ethyl acetate * Special test for Benzaldehyde * Formation of crystals * Molisch Test – General test for Carbohydrates * Violet ring (2nd layer) * Glucose – positive * Starch - positive * Benzaldehyde
Premium Carboxylic acid Oxygen Alcohol
Tris(acetylacetonato)manganese Dissolve 0.26 g manganese(II) chloride tetrahydrate and 0.68 g of sodium acetate in 10 mL of distilled water. Add 1 g acetylacetone and swirl the mixture. With magnetic stirring‚ add dropwise a solution of 0.052 g potassium permanganate in 2.5 mL of distilled water over a period of 10-15 minutes. Stir for 10 minutes‚ then add dropwise a solution of 0.63 g sodium acetate in 2.5 mL distilled water. Heat the resulting mixture on a hot plate to between 60 and 70oC for 15 minutes
Premium Oxygen Water Chemistry
CHAPTER 4 Presentation‚ Analysis and Interpretation of Data This chapter includes discussion on the presentation‚ analysis and interpretation of data obtained in the physical‚ chemical‚ and biological test. 1. Extraction and Isolation of Tannins An extraction and isolation was conducted by the researchers to determine and calculate the amount of tannins from the Otaheite Gooseberry leaves. The results are the following: Table 1 Result of the Extraction and Isolation of Tannins Weight of
Premium Solvent Solubility Brown
Pyruvate dehydrogenase complex catalyzes three reactions‚ getting rid of Pyruvate’s carboxyl group (COO−) because it was already fully oxidized‚ using the remaining 2-carbon fragment to form acetate while also transferring extracted electrons to NAD+ to form NADH+‚ and lastly attaching coenzyme A to acetate‚ forming acetyl CoA. Since this whole process was done for 2 Pyruvate molecules‚ we have two acetyl CoA molecules. The acetyl CoA then enters the Krebs cycle and is attached to a 4-carbon molecule
Premium Adenosine triphosphate Cellular respiration Metabolism
Weaving: interlacing yarns Fabric Face: smoother and more lustrous; clearer and brighter print or design; more pronounced finish; floats are on the face Fabric Back: imperfections and knots; print or design duller and less distinctive; more noticeable tentering marks Warp Yarns: parallel to the salvage; thinner; stronger; more twist; usually greater in number (in unbalances weaves); straighter and more parallel; usually filament yarns (depending on fabric content) Filling Yarns: perpendicular
Premium Fiber Knitting Cellulose
SYNT m o d u l a r · l a b o r a t o r y · p r o g r a m · i n · publisher: H. A. Neidig c h e m i s t r y 738 organic editor: Joe Jeffers Copper-Catalyzed Oxidation of Benzoin to Benzil prepared by Carl T. Wigal‚ Lebanon Valley College PURPOSE OF THE EXPERIMENT Oxidize benzoin to benzil using ammonium nitrate and copper(II) ion as a catalyst‚ monitoring the reaction by thin-layer chromatography. Characterize the product using melting point measurement and infrared spectroscopy. EXPERIMENTAL
Premium Acetic acid Laboratory equipment Nitrogen
Name: Shahid Hussain Subject: Chemistry Teacher: Dr Ramani Topic: Comparing Solutions Saturated Solutions | A solution that can hold no more of the solute at a particular temperature is said to be a saturated solution at that temperature. | When someone adds sugar to iced tea‚ the sugar disappears. If you add one teaspoon of sugar to iced tea‚ you get an unsaturated solution. If you keep
Premium Concentration Chemistry Solution
Abstract: In this lab‚ the chemical components of Excedrin and Tylenol‚ two common‚ over-the-counter analgesic drugs‚ were determined by utilizing the technique of thin-layer chromatography‚ or TLC. The active ingredients of Excedrin were caffeine‚ acetaminophen‚ and aspirin with Rf values of 0.11‚ 0.38‚ and 0.61‚ respectively. The lone active ingredient of Tylenol was acetaminophen with an Rf value of 0.39. The elution sequence obtained in the experiment is as follows: ibuprofen (least polar)
Premium