Extraction of Caffeine from Tea leaves Casinabe‚ Antonio Karlo‚*Catahay‚ Jesus Alfonso‚ Cerdena‚ O’neil‚ Cordova‚ Robelle Department of Biological Sciences‚ College of Science University of Santo Tomas‚ España Street‚ Manila 108 Group 4 2MB Date Submitted: December 13‚ 2012 ------------------------------------------------- ABSTRACT: The purpose of this experiment is to extract the amount of caffeine present in tea bags. In this experiment‚ isolation‚ characterization and purification
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(mcΔT)Substance = - [(mcΔT)Water + (CΔT)Calorimeter] Materials: Coffee-cup calorimeter Water Safety Goggles Thermometer Lab Apron Ringstand Tongs Clamp Graduated Cylinder Test tube Unknown Metal Sample Hotplate Triple Beam Balance (or other mass measuring equipment) 600 ml Beaker Procedure: 1. Follow all safety guidelines prior to starting. Clear lab station. Gather all materials. 2. Set up the coffee-cup calorimeter as shown in the previous experiment in Figure 17-1. 3. Pour
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Organic Chemistry Laboratory – CH 200L (2012 – 2013) 2B-Ph Group 9 Experiment 10 Identifying Carboxylic Acids and Derivatives Through Classification Tests Bianca Therese Rivera‚ Camille Aliana Rivera‚ Zarah Mae Roxas‚ Ma. Rosario Teresa Saylo‚ Jean Darlene Semilla and Adrian Yu Department of Pharmacy‚ Faculty of Pharmacy University of Santo Tomas‚ Espana Street‚ Manila 1008 Date Submitted: September 13‚ 2012 ------------------------------------------------- Abstract Carboxylic acid derivatives
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Lab 2: The Chemistry of Life Name _____Aniqa Qureshi_ Insert the chemical symbol in the answer blank for each of the following elements. ___O______ 1. oxygen ___C______ 2. carbon ___K______ 3. potassium ___I______ 4. iodine ___H______ 5. hydrogen ___N______ 6. nitrogen ____Ca_____ 7. calcium ____Na_____ 8. sodium ____P_____ 9. phosphorus ____Mg_____ 10. magnesium ____Cl_____ 11. chloride ____Fe_____ 12. iron In the space below‚ list the chemicals (above) from the MOST
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There has been much debate in recent years among politicians‚ military officials‚ and civilians on whether or not the U.S. should be fully withdrawn from Afghanistan‚ regardless of the country’s economic and military capabilities. There has also been a proposed timetable‚ which President Obama says is in effect and currently being executed‚ to have up to ninety percent of our military personnel out of the country by no later than 2014. It is imperative that we extract our forces out of Afghanistan
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Extraction of Caffeine from Tea Leaves Jaybee Balilea‚ Sharmaine Baysic‚ and Maria Anjelette Patricia Belen 3BIO7‚ Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Extraction is a technique for isolating and purifying organic substances. In this technique‚ a solution is combined thoroughly with a second solvent that is immiscible with the first solvent. The solute is extracted from one solvent into the other because it is more soluble in the second solvent
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Banana Oil Lab Report Jesse Bradford 7/10/14 MTWR Section Introduction In the banana oil lab we began with isopentyl alcohol + acetic acid isopentyl acetate + Water. We needed for this experiment a hot plate‚ clamps‚ pipette‚ 5mL vial‚ caps‚ hoses and a thermometer. Upon starting‚ our group set up an open system experiment that allowed gases to be released to avoid pressure build up. We mixed together to molecules‚ 1.0mL of isopentyl alcohol‚ 1.5mL of acetic acid
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In this lab‚ the pH of flat sprite and a fresh sprite are compared two ways: one way was to record the pH directly with a digital pH probe and the other was to calculate the concentration through titration. Because the reaction is a neutralization reaction‚ the concentration of can be calculated if the concentration of is known. At the end of the titration‚ the moles of will equal the moles of and the pH is expected to be greater than 7 because the found in sprite is weak and is a strong
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Identification of Organics from an Aqueous/Organic Environment through Physical Manipulation Date Lab Performed: Nov. 11/2013 Date Lab Submitted: Nov. 18/2013 Introduction We conducted this experiment to investigate the technique of liquid / liquid extraction‚ the miscibility of organics and water and the effect of a mixture of compounds in methylene chloride versus pure compounds retention time as introduced to a Gas chromatograph. From this
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to 50.0mL using deionised water.The solution was then transferred to a dry 50.0mL measuring cylinder.The solution was stirred thoroughly using a glass rod. 4.10.0mL of the solution was poured into test tube 1. 5.5.0mL of solution was measured out from the 50.0mL solution prepared in Step 3 and was poured into a 50.0mL measuring cylinder.The solution was then again diluted to 50.0mL using deionised water. 6.10.0mL of the solution was poured into test tube 2. 7.Step 5 was repeated to prepare solution
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