learn the separation technique by using TLC plate in separating a mixture of compound by using spinach leaf. Apparatus:UV lamp‚capillary ‚250 ML beaker Materials:aspirin‚acetaminophen‚caffeine‚unknown A‚unknown B‚TLC plates‚ethyl acetate‚Hexane‚acetic acid‚iodine Introduction: Procedure: A.spotting of the TLC plates 1.A TLC plates is obtained from my instructor. 2.the plate is set down on a clean‚dry surface then a line Is drawn lightly across the plate about 1cm from the bottom of the
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copper Incorrect E.All of the above are solutions. Answer Key: D Question 3 of 12 4.0/ 4.0 Points Hexane‚ a nonpolar solvent‚ will dissolve which of the following substances? A.ammonium acetate B.sodium chloride Correct C.oil D.vinegar (acetic acid) E.none of the above Answer Key: C Question 4 of 12 0.0/ 4.0 Points What is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water? A.29.7% Incorrect B.42.3% C.70
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Introduction: In the lab‚ Bromide was combined with trans-cinnamic acid in order to see if the resulting product at the end of the experiment would yield either an erythro- or threo-dibromide. Based on how well this experiment was done there is a possible product that would have a melting point around 95°C‚ threo-‚ 205°C‚ erythro-‚ or somewhere in the middle which would be a combination of the two. The process of refluxing was used to purify the mixture followed by crystallization. In the end
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of the organic layer could have been transferred along with the aqueous layer when the aqueous layer was getting separated from the organic layer by a pipette. One of the methods that favors the formation of an ester can be made by adding excess acetic acid and another method is conducting Fischer esterification‚ which water will be removed to form the ester. There are several ways to have more isopentyl acetate. First‚
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Available online at www.pelagiaresearchlibrary.com Pelagia Research Library European Journal of Experimental Biology‚ 2012‚ 2 (2):385-388 ISSN: 2248 –9215 CODEN (USA): EJEBAU Effect of cooking on amylose content of rice ______________________________________________________________________________ ABSTRACT In diabetes type 2‚ there is a deficiency of insulin which results in improper/ slow breakdown of food. This results in sugar level spikes immediately after a meal‚ which can be
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Ginger (Zingiber officinalis) and Vinegar As an Organic Insecticide An investigatory project that is presented to Mr. Fritz O. Marata of Marigondon National High School In partial fulfillment of the subject Science III Researchers School Year: 2013-2014 Acknowledgement This study aimed to introduce the combination of ginger and vinegar in order to make a nature-friendly insecticide. For the successful completion of our study
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SSN COLLEGE OF ENGINEERING DEPARTMENT OF CHEMICAL ENGINEERING V Semester – CH 2307 TECHNICAL ANALYSIS LAB -2010 INDEX SHEET CYCLE ONE Date of Condn. Date of Subn. Sign 1 Estimation of COD of the given sample of water. 2 Estimation of Manganese in the given pyrolusite ore. 3 Estimation of Magnesium by EDTA method. 4 Estimation of purity of drug using pH meter. 5 Estimation of Ammonia in ammonium salts. 6 Polarimetric estimation of sugar
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contains 25 mole% nitrogen and the balance hydrogen. The flow rate of the stream is 3000kg/h. Calculate the rate of flow nitrogen into the reactor in kg/h. 7. A mixture is 10.0 mole% ethyl alcohol‚ 75.0 mole % ethyl acetate (C4H8O2) and 15.0 mole% acetic acid. Calculate the mass fractions of each compound. What is the average molecular weight of the mixture? What would be the mass (kg) of a sample containing 25.0 kmol of ethyl acetate? 8. A 5.00wt % aqueous sulfuric acid solution (ρ=1.03
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Response: “After sealing the bottle with a butyl rubber stopper and an aluminum crimp‚ the bottle was purged with pure nitrogen (for 10 min) to obtain anaerobic conditions.” This explanation is added to the revised manuscript. (Page 8‚ line 13-15) Comment 14: Page 8: Explain if pH was controlled during fermentation. In any case‚ do a reference in the result section to the pH at the end of fermentation Response: The pH was not directly controlled during the fermentation. In the line with typical
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of D-Arabino-Hexulose Phenylosazone In a 50 mL quick-fit round bottom flask with a reflux condenser‚ dissolve 10 g cane sugar in a mixture of 20 mL glacial acetic acid. Boil mixture for 30 minutes. Add the phenylhydrazine solution through the condenser. Remove from the hot plate. Rinse with 5 mL of 1:1 mixture of water and glacial acetic acid to complete the transfer of phenylhydrazine. When a yellow solid emerges‚ swirl the mixture. Wrap a dry cloth around the flask. Cool to room temperature (preferably
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