flower and fruits showed varying degrees of antioxidant activity in different test systems in a dose-dependent manner. The antioxidant activity was correlated with the amount of total phenolics present in the respective extracts in each assay. 50% acetone proved to be the most efficient solvent for extraction of antioxidants from mahua as the related extract contained the highest amount of phenolic compounds and also exhibited the strongest antioxidant capacity in all the assays used‚ while ethanol
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shamefully seen in a Prius or Smart Car. One way to cheaply increase the fuel efficiency of your very own car is with the use of pure Acetone. Pure Acetone added to your gas tank at a ratio of three ounces of Acetone per ten gallons of gasoline can increase your fuel economy by 15 – 35 % depending on what you drive and what gasoline you use. This works because the Acetone changes the molecular structure of the gasoline so that it “stirs up” the molecules of the fuel to break surface tension‚ making the
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3 x test tubes 3. 1 x test tube containing distilled water‚ cyclohexane and a cylinder of beetroot‚ labelled TT4. 4. Test tube rack 5. A bottle containing 8 ml distilled water 6. A bottle containing 8 ml 50% acetone 7. A bottle containing 8 ml 100% acetone 8. Permanent marker pen 9. 1x sheet graph paper Experimental procedure 1. Using the permanent marker pen‚ label the empty
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in the acetone will have a higher pigment of chlorophyll a and the red leaf lettuce will have a higher pigment of anthocyanin. I believe the spinach leaf in distilled water will have a higher pigment of chlorophyll a and the red leaf lettuce will have a higher pigment of anthocyanin. Discussion Questions: 1. Describe what each of your chromatography strips looked like. Specifically‚ identify the pigments on each strip and compare their positions to one another. The Spinach in acetone(S in a)
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of test tubes that contained water‚ acetone‚ or dichloroethane. Solubilities were then tested for each sample in each solution which can be seen in Table 5. Next‚ four random pills were obtained and weights were taken of each. Each of the pills were grinded up using a separate mortar and pestle. The grinded up pills were then weighed. The grinded up pills were placed in separate beakers each containing 10 ml of Acetone. Once the pills had dissolved in the acetone‚ a vacuum filtration‚ using a hirsch
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- distilled water‚ acetone‚ ethanol at four different concentrations. Plant powder was weighed and mixed with the three solvents to attain four different concentrations viz.‚ 20%‚ 40% 60% and 80% respectively. These extracts were further used for the
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filtration. The product was then recrystallized in the presence of 95% ethanol producing long red needles. 0.536g‚ 2.07mmol‚ 158-160°C (160°C lit3)‚ 54.6% recovery. Thin layer chromatography was performed in three different eluents‚ hexane‚ toluene‚ and acetone. The chromatography compared aniline‚ 2‚ 4-dinitrobromobenzene‚ and a sample from the mixture of the two reactants when the reaction first began to take place. Another thin layer chromatography used a product sample an hour after the reaction first
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technique is especially important in chemical identification‚ where the melting point of the compound is taken to confirm its purity. In order to perform recrystallization a solubility test much be completed. Four solvents (95% Ethanol‚ Petroleum Ether‚ Acetone and distilled water) were used to identify which one is an ideal solvent. An ideal solvent is insoluble in room temperature and soluble in hot solvent. 0.5mL of each solvent were added into four reaction tube with 25mg`of pure Benzoic acid. After
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EXPERIMENT 5 GAS DIFFUSION COEFFICIENT OBJECTIVES: Determine the gas diffusion coefficient of acetone using the established Winkelmann’s method KEYWORDS Diffusivity‚ Gas Diffusion Coefficient‚ Winkelmann’s method OVERVIEW The knowledge of physical and chemical properties of certain materials is important because very often process engineering deal with the transformation and distribution of these materials in bulk. One such property is diffusivity. Mass transfer by diffusion takes
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g 86.64% Solubility of Precipitate ion [Cu(NH_3 )_4 ]SO_4*H_2 O+Solvent Observation of Solubility [Cu(NH_3 )_4 ]SO_4*H_2 O + Acetone When the precipitate ion was added to ~1 mL of acetone there was a strong property of insolubility. Even when a stir rod was used to mix the precipitate in the acetone‚ the precipitate remained un-dissolved in the solvent. [Cu(NH_3 )_4 ]SO_4*H_2 O + DI Water When the precipitate ion was added to ~1 mL of DI water‚ the precipitate
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