RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
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CHROMATOGRAPHY OF PLANT PIGMENTS Marquez‚ Ma. Rica Paulene‚ Moises‚ Patrisha Kate‚ Policarpio‚ Jairus Paolo‚ Rolda‚ Zylene Joy Department of Biology‚ College of Science‚ University of the Philippines Baguio April 23‚ 2013 ABSTRACT The objective of this experiment was to apply the technique of paper chromatography as a method for separating individual plant pigments contained in plant tissue extracts containing pigment blends. The process of chromatography separates molecules because of the
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Bioenergetics Photosynthesis & Respiration Laboratory Report Exercise 6 PBIO101 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Gina Dedeles Minda Dimaano-Kho Group 5 Felicita‚ Haniel Paulo‚ Gisselle Mildred V. Aniseta‚ Carmelus*Absent but present
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Potato juice! 7. Sucrose juice! 8. Glucose juice! 9. Distilled water! 10. Reducing-sugar solution! 11. Starch solution! 12. Sodium hydroxide (NaOH)! 13. Egg albumen! 14. Honey! 15. Amino acid solution! 16. Protein solution! 17. Water! 18. Acetone! 19. Vegetable Oil! 20. Salad oil! 21. Known lipid solution ! 22. Sudan IV! 23. Brown wrapping paper or brown paper bag! 24. Eyedropper! 25. Pipette! 26. Test tube holder! ! ! ! METHODS ! ! Benedict’s test for reducing sugars
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Adol Condensation Introduction: This reaction is carried out by adding benzaldehyde and acetone into a flask. The product created is a 1‚5-diphenyl-1‚4-pentdiene-3-one‚ which includes two double bonds‚ and two benzyl ring functional groups. This is a dehydration reaction that occurs twice in order to form the diene. After obtaining the product‚ via vacuum filtration‚ it will be recrystallized and then analyzed for purity by determining both products’ melting point. The two products will be
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workshop‚ to produce the powder. The process was similar to that of making kajal. The researchers used two earthen pots—one to keep wood wool and the other to cover it. The wood wool soot deposited on the upper pot was scraped out and washed with acetone. The washed soot was then air dried and oxidised with nitric acid to obtain wsCNPs. The nanoparticle was tested on three types of mosquitoes–Anopheles‚ Aedes and Culex. To monitor the growth and life cycle‚ optical fluorescence microscope was used
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procured from Agilent Technologies (USA). HPLC grade acetonitrile‚ acetone and ethyl acetate were supplied by Merck (Mumbai‚ India). Analytical grade sodium chloride (NaCl) and anhydrous magnesium sulfate (MgSO4) was obtained from Merck. Anhydrous magnesium sulfate was activated in a muffle furnace at 400 ºC for 6 hr before to use and kept in desiccators. Individual standard stock solutions of 1000 µg/mL were prepared in acetone in a class A grade volumetric flask of 25 ml capacity by dissolving
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Pale blue (weak +) | Procedure 6.4 When we added a few drops of vegetable oil to 5mL of water‚ the oil separated from the water‚ meaning it is insoluble in polar solvents. When we added a few drops of vegetable oil to 5mL of acetone‚ the oil mixed in with the acetone‚ meaning it is soluble with nonpolar solvents. Table 6.3 Solutions and Color Reactions for the Sudan IV Test for Lipids Solution | Description of Reaction | 1 mL vegetable oil + water | Oil separated from the water‚ (+) for
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Objective: The objective of the lab is to separate the caffeine samples we are using‚ using thin layer chromatography. The solvent we are using for the separation is 3:1 mixture of Chloroform and Acetone. Principle: Thin layer chromatography (TLC) is an important technique that is useful for separating organic compounds. TLC is often used to monitor the progress of organic reactions and to check the purity of products. Separations in Thin layer chromatography involve distributing a mixture of
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Restoring Balance LeChâtelier’s Principle and Equilibrium Introduction Chemical equilibrium is a true balancing act. What happens when the balance is disturbed? The purpose of this lab is to observe the effects of concentration and temperature on equilibrium and to visualize how balance can be restored based on LeChâtelier’s Principle. Background Not all chemical reactions proceed to completion‚ that is‚ to give 100% yield of products. In fact‚ most chemical reactions are reversible
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