number is 78-93-3. The colorless liquid ketone has a sharp‚ sweet odour of butterscotch and acetone. It is produced industrially on a large scale‚ and also occurs in trace amounts in nature. It is soluble in water and is commonly used as an industrial solvent. With natural and synthetic resins‚ MEK produces solutions with low viscosity and high solids content. Properties The physical and chemical properties of MEK are determined largely by its carbonyl group. MEK engages in reactions typical of saturated
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partitioning the solid in 2 immiscible solvents‚ diethyl ether and sodium bicarbonate or sodium hydroxide. II. Significance a. The significance of the Extraction lab is to purify Acetanilide benzoic acid‚ 2-naphthol‚ and naphthalene by determining the partition coefficient. This value is determined by dividing the solubility of the given solute in the extraction solvent (Sodium bicarbonate or Sodium hydroxide)) by the solubility in the original solvent (Diethyl ether). III. Theory a. New
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Faculty of Agriculture‚ AL-Azhar University‚ Cairo‚ Egypt Abstract: This work aimed to evaluate the efficiency of different organic solvents such as‚ methanol‚ ethanol‚ dichloromethane‚ acetone‚ hexane and ethyl acetate for extraction of ( flavonoids and polyphenolic compounds(TFC and TPC respectively) from the orange peel. Also‚ the effect of these solvents on the yield percentage‚ chelating activity‚ antioxidant/radical scavenging capacity and reducing power ability of the produced extracts
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measured‚ the molar mass of an unknown substance can be found. Pre-Lab Questions: 1. a. Determine the freezing point depression 53.02 – 50.78 = 2.24 °C b. Calculate the molar mass of the unknown substance 7.1 °C/m X 2.04 g (solute) X 24.8 g (solvent) X 2.24 °C = 260.0 g molar mass = 260. g 2. What are colligative properties? Colligative properties are properties of a solution that change when the condition of the solution changes. II. PROCEDURE Part B 1. Set up a Bunsen Burner
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has a melting point around 135°C and a pure salicylic acid has 158 °C. TLC is used to separate compounds based on affinity for stationary phase or mobile phase. In TLC‚ the solvent went up at different rates. The retention factor (Rf) of a component can then be measured by dividing the distance that was traveled by the solvent front distance.By doing this experiment‚ the number of moles and grams of salicylic acid and acetic anhydride can be answered. Methods/ Material: Capillary tube TLC Plates
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dispensed into the previously weighed watch glass. The previous steps were then repeated two more times. The watch glass with the decantate was placed to the back of the mini hood so the solvent could evaporate. After half of the solvent was evaporated‚ the watch glass was then moved to the drying oven. Once the solvent was completely evaporated and cooled‚ it was weighed and recorded.
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points of both part a and part b samples were fairly close to the melting point of my pure sample so I would conclude that it was quite pure. 2. Suppose you were performing a recrystallization and you had just added the optimal amount of boiling solvent to dissolve your impure solid…but then you a squirrel ran by and you decided to chase it. When you got refocused and returned to your experiment‚ you realized that you’d left your Erlenmeyer flask containing your recrystallization solution on the
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system at 220". We had independently discovered a simpler and more general method for preparing compounds of this type which involves heating chromium hexacarbonyl under reflux in an excess of the aromatic compound or with a molar quantity in an inert solvent. Shortly after our preliminary communication‚2 Natta and his co-workers also described the direct preparation of several of these compounds‚ but used a pressurised system (with intermittent release of carbon monoxide) and higher temperatures (200-235")
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Barnidipine hydrochloride is ([3S]-l-benzyl-3-pyrrolidinyl methyl [4S]-2‚6-dimethyl-4-[m-nitrophenyl]-l‚4-dihydropyridine-3‚5-dicarboxylate hydrochloride) has been synthesized and developed as an antihypertensive drug by Yamanouchi Pharmaceutical Co Ltd. (Tokyo‚ Japan). Physicochemically‚ Barnidipine hydrochloride differs from other dihydropyridines‚ such as nifedipine or nisoldipine‚ in its water solubility. The solubility of Barnidipine at room temperature is 2.89 mg/ml [1]. Literature review reveals
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Experiment 1: Mixtures Aim: To develop an understanding of different types of mixtures including solutions and to examine the different solubilities of some solutes in two solvents: water and ethanol Procedure: Refer to Experiments Book Pg 13 Results: Part A- Mixture Observations Classifications 1 100% Orange Juice There were suspended pulp in the juice Heterogeneous Mixture 2 100% Apple Juice Clear solution Homogeneous Mixture 3 Solder Uniform mixture Homogeneous Mixture 4 Fruit Cake Chunks
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