Extraction of Caffeine from Tealeaves Perez‚ Albert Solomon K.*; Quiambao‚ Marie Angela C;.Pascua‚ Hanna Harriette R.; Patricio‚ Maria Roxanne DC.; 2-Chemistry‚ Department of Chemistry‚ College of Science University of Santo Tomas España St.‚ 1015‚ Manila Abstract Caffeine is soluble in both water and organic solvents‚ solid-liquid extraction and liquid-liquid extraction were used in the experimentation process. Caffeine was extracted using hot water‚ however‚ due to its
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products made in the light independent stage of photosynthesis are NADP+ and ADP. Apparatus 1 Lamp 6 Green aquatic plant (Elodea) 1 500ml Beaker 1 Thermometer 110°C ±0.5 1 Metre ruler ±0.5 1 Test tube 50g Sodium hydrogen carbonate 1 Funnel 1 Stopwatch 1 water bath Independent variable Distance between plant and light bulb affecting the light intensity Dependant variable Number of oxygen bubbles of oxygen produced as a bi-product of photosynthesis. Control variables:
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Cations and Anions Reaction Introduction: This experiment seeks to explore different chemical reactions conducted in the lab. A cation is defined as positively charged ions‚ which are K+ and Pb2+ in this experiment‚ and an anion is termed as negatively charged ions‚ which are CrO4 2- and NO3 2-. The major objective of this lab experiment was to examine the reaction between cations and anions‚ as well as observing‚ and documenting the chemical reactions. We will be demonstrating the reaction between
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management approach. New York‚M.E. Sharp Inc Kotler‚P.‚Armstrong‚G.‚Wong‚V.& Saunders‚J.(2008).Principles of marketing (5th edition). Harlow‚ Pearson education England Measuring media effectiveness : Comparing media contribution throughout the purchase funnel.(2006).New York‚Magazin publishers of America Reid‚L.‚Whitehill King‚K.‚Martin‚H. & Soh‚H.(2005).Local advertising decision makers’ perceptions of media effectiveness and substitutability. Journal of media economics‚18(1)‚35-53 Riesenbeck‚H.& Perrey
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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? The way the fluted filter paper is folded hastens filtration because it increases the surface area of the filter paper‚ giving the solution more area to go through. A piece of wire is placed to avoid build-up of pressure‚ and easily pour the solution without spilling. 2.) Enumerate 2 techniques that can help
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distilled water was added. The mummion mud then had to be dissolved in the distilled water by stirring leaving the sand and iron (III) oxide. It then has to be filtered. After folding we placed the fluted filter paper into a funnel‚ the mud was placed into the top. The funnel was then placed on to a conical flask. After some time the mud will filter through in the form of a liquid. This is then put into a evaporation dish. Then the dish placed this evaporation dish on top of the tripod over a lit
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Synthesis of Aspirin and Tylenol Kyla Wykoff Abstract Aspirin and Tylenol were synthesized by means of crystallization‚ recrystallization‚ and melting point determination. Synthesis produced significantly high percent yields for aspirin‚ however‚ produced extremely low and impure percent yields for Tylenol. A second group was also used to compare results and errors‚ in which they too were also producing extremely low percent yields of Tylenol. Therefore‚ error was based on the specific protocol
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After the 10ml of dichloromethane was added to the separatory funnel‚ two layers began to form. The top layer is the organic layer and contains the caffeine while the aqueous is at the bottom. The dichloromethane has a density of 1.326g/cm so it is denser than water and thus is at the bottom of the funnel. After the distillation ‚ the Bunsen burner was used to sublimate the caffeine as the heating mantle and the water bath would take
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Running head: Final Report Outline of Final Report Charles Atchison SCI 207: Dependence of man on the environment Instructor: Marshall Bowles 6 April‚ 2014Abstract Three experiments were conducted during week two. The first was to determine how many contaminates that we put into our water supply will reach our groundwater. The conclusion that I arrived at was‚ that there are still large remnants of contaminates in the groundwater supply after it has had a chance to be passed
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