"Extraction Of Caffeine From Coffee Lab Report" Essays and Research Papers

  • Extraction Of Caffeine From Coffee Lab Report

    a liquid-liquid extraction method to extract the caffeine from the tea bags that were provided, and then recrystallize the caffeine. The solvents used in the experiment were an aqueous sodium carbonate and dichloromethane (DCM). Anhydrous calcium chloride pellets were used to dry the solution and emulsion layer and the DCM was then decanted. After washing the anhydrous calcium chloride pellets with more DCM, the solvent was evaporated, leaving greenish-white crystalline caffeine residue weighing...

    Chemistry, Laboratory glassware, Sodium 1178  Words | 4  Pages

  • Caffeine Extraction from Tea Pre Lab Report

    Describe an alternative method for evaporation of the CH2Cl2 Can be steamed and then rinsed with ethyl acetate for several hours, and then rinsed with water, or can be soaked in a bath of CO2 and run through water, making carboxylic acid. (2) Caffeine: (4) Repeated exposure can produce general deterioration of health by an accumulation in one or many human organs. First Aid Measures: Eye contact - Immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. WARM...

    Chemistry, Distillation, First aid 662  Words | 2  Pages

  • Isolation of Caffeine from Coffee

    -------------------------------------------------   Isolation of Caffeine from Coffee Date of laboratory work: 10/9/2012 5:00-7:45 Date of report written: 10/15/2012 Introduction: The purpose is to isolate caffeine from coffee by using the organic solvent dichloromethane (CH2Cl2) that is also referred to as direct contact. Calcium carbonate (CaCO3) is used to remove the tannins from the coffee. Afterwards an extraction is used to separate the organic layer (bottom) from the aqueous layer (upper). By using...

    Caffeine, Chemistry, Distillation 873  Words | 4  Pages

  • Extraction of Caffeine

    note: A09-010A The quantitative determination of caffeine in beverages and soft drinks using UV wavelength spectroscopy Introduction Caffeine is a naturally occurring alkaloid which is found in the leaves, seeds or fruits of over 63 plants species worldwide. The most common sources of caffeine are coffee, cocoa beans, cola nuts and tea leaves and the worldwide consumption of products derived from these natural materials means that caffeine is one of the most popular and commonly consumed drugs...

    Caffeine, Coca-Cola, Coffee 1381  Words | 5  Pages

  • Extraction of Caffeine from Tea Bags

    Extraction of caffeine from tea bags ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags   were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml), done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer was dried...

    Black tea, Caffeine, Camellia sinensis 2408  Words | 7  Pages

  • lab extraction of caffeine

    261 (KC) Dr . McAtee Lab : Extraction of Caffiene Purpose: the purpose of this experiment is to extract caffeine from tea using solvent extraction techinques. Reference: Williamson, K.; Minard, R.; Masters, K. Macroscale and Microscale Organic Experiments, 2007, p. 137 to 171. Procedure: In a 50 mL beaker place 15 mL of water, 2.0059 g of sodium carbonate, and a wooden boiling stick. Bring the water to a boil on the ceramic heating plate. Remove the beaker from the hot plate and remove...

    Boil, Erlenmeyer flask, Evaporation 758  Words | 4  Pages

  • Extraction of Caffeine from Tea Leaves

    EXTRACTION OF CAFFEINE FROM TEA LEAVES ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml), done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer...

    Caffeine, Chemistry, Coffee 1109  Words | 5  Pages

  • Extraction of Caffeine from Thea Sinensis

    Extraction of Caffeine from Thea sinensis Abstract Extraction of Caffeine from Thea sinensis main objective is to isolate, purify characterized caffeine from tea leaves. Sublimation technique was used to get the % yield which is 0.07%. The melting point of the standard caffeine with the sublimate is 229°C. Introduction The active ingredient that makes tea and coffee valuable to humans is caffeine. Caffeine is an alkaloid; a class of naturally occurring compounds containing nitrogen and...

    Caffeine, Coffee, Green tea 1695  Words | 6  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of caffeine from Lipton tea leaves Maria Gianna Beatrice L. Cancio*, Joe Mari Isabella B. Caringal, Rowena A. Chiang, Patricia Deanne del Valle Department of Biological Sciences, College of Science, University of Santo Tomas, España, Manila, Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three...

    Caffeine, Liquid, Liquid-liquid extraction 2197  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    Abstract: Caffeine, (C8 H10 N4 O2) a white, crystalline alkaloid known as a nervous system stimulant found commonly in tea leaves and coffee, can be extracted using the method of sublimation with the use of Methylene Chloride (CH2Cl2) and Sodium Hydroxide; both can repeatedly rinse the green (unroasted) coffee beans from the caffeine. Keywords: Caffeine, Methylene Chloride, Sodium Hydroxide, Anhydrous Sodium Sulfate I. Introduction Caffeine is an alkaloid of the methylxanthine family. Its chemical...

    Caffeine, Coffee, Dichloromethane 1191  Words | 4  Pages

  • Caffeine Extraction from Tea Leaves

    Extraction of Caffeine from Tea Leaves Marc Tugaoen, Kristine Vanzuela, Rafael Villanueva, Justeen Wong Department of Chemistry, University of Santo Tomas, Manila, Philippines Abstract This experiment has been divided into 4 set-ups, first was the solid-liquid extraction, next was the liquid-liquid extraction, then the sublimation and last was the melting point determination. The solid-liquid and liquid-liquid extraction were both done during the first meeting, the DCM layer was filtered and...

    Caffeine, Coffee, Green tea 1390  Words | 5  Pages

  • Extraction of Caffeine from Tea Leaves

    describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment, it was visible in the process wherein the components of the tea leaves were dissolved in two solvents, water and dichloromethane (DCM), with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore, the purified caffeine was subjected...

    Black tea, Caffeine, Camellia sinensis 2313  Words | 7  Pages

  • Extraction of Caffeine from Thea Sinensis

    Extraction of Caffeine from Lipton Yellow Label Teal Leaves Arlie Bamiano, Jealine Bernabe, Petrenne Caimbon*, Jhia Caso Department of Biology, University of Santo Tomas Abstract In order to extract pure caffeine from Lipton Yellow Label tea leaves, several extractions and phase transition techniques were employed to 6.5029 grams of sample. Initially, the tea leaves were boiled in water to extract tea from the leaves (Solid-Liquid Extraction). After extracting the tea, several steps of...

    Caffeine, Green tea, Laboratory glassware 1592  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    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...

    Caffeine, Camellia sinensis, Green tea 1798  Words | 7  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Santos, Raphael, Samson, Nonia Carla, *Tabora, Brylle, Tan, Kate Michal Department of Biological Sciences, University of Santo Tomas, Manila, Philippines Abstract Tea leaves are natural products that are harvested from agriculture. Caffeine, on the other hand, is a stimulant that has been shown to speed up the time of reaction, increase alertness, and improve one’s concentration. What we did in this experiment was to extract the alkaloid caffeine content...

    Alkaloid, Caffeine, Chemistry 631  Words | 3  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Department of Biological Sciences, College of Science University of Santo Tomas España, Manila, 1028 ABSTRACT: Caffeine is a white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing...

    Caffeine, Chemistry, Melting point 1526  Words | 5  Pages

  • Isolation of Caffeine from Tea

    of Submission: November 28, 2012 Experiment No. 1 ISOLATION OF CAFFEINE FROM TEA I. Introduction Caffeine is a very common substance and is found in coffee, tea, soft drinks, chocolate, and "stay-awake" pills such as Vivarin. It can be synthesized or isolated from natural sources. Caffeine constitutes approximately 4% of tea and coffee leaves, and is also found in cola nuts and cacao beans. Caffeine is a member of the class of compounds organic chemists call alkaloids. Alkaloids...

    Caffeine, Distillation, Evaporation 1380  Words | 5  Pages

  • Extraction of Caffeine

    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...

    Caffeine, Chemistry, Extraction 1896  Words | 7  Pages

  • Chemistry lab report

     Department of Chemistry Extraction and Sublimation Experiment #4 10/02/13 Introduction Caffeine is a stimulant found in tea, coffee, cocoa, OTC medication, and cola drinks.It stimulates the brain and the central nervous system, so that a person feels less tired and more alert. The purpose of this lab is to determine the amount of caffeine in tea. The major component of tea is cellulose which is a polymer of glucose. Materials Lab coat Goggles Graduated cylinder 1 tea...

    Caffeine, Chemistry, Coca-Cola 556  Words | 3  Pages

  • Extraction of Caffeine

    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...

    Caffeine, Distillation, Green tea 1572  Words | 6  Pages

  • Multiple Extraction of Caffeine from Dried Tea Leaves

    MULTIPLE EXTRACTION OF CAFFEINE FROM DRIED TEA LEAVES USING DICHLOROMETHANE Delos Reyes, K., Dizon, G.J., Enriquez, J.R., Estrada, G. and Garcia C. Group 4 2G Med Tech Organic Chemistry Laboratory ABSTRACT Caffeine was extracted from dried tea leaves by multiple extraction technique. 10g of tea leaves was boiled in a solution of 4.4 g anhydrous sodium carbonate and 100ml distilled water and was extracted three times using 20 ml of dichloromethane. Theresidue was collected by decanting...

    Chemistry, Evaporation, Liquid-liquid extraction 780  Words | 3  Pages

  • Extraction of Caffeine from Tea Leaves

    Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However, water extracts more than just caffeine, so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water...

    Chloroform, Dichloromethane, Diethyl ether 1151  Words | 4  Pages

  • Isolation of Caffeine from Tea Leaves

    Extraction of Caffeine from Lipton® Tea Leaves Nathaniel Camangon*, Kaila Bumagat, Franz Mari Burgos, Remigio Callanta Department of Chemistry, College of Science, University of Santo Tomas, Manila, Philippines Abstract This experiment mainly focuses on the extraction of pure caffeine by multiple extraction from commercially acquired tea leaves and determining its purity by melting point determination. A 0.02% yield of pure caffeine was obtained from 10.4978g of tea leaves (4 tea bags)....

    Caffeine, Green tea, Liquid-liquid extraction 1966  Words | 6  Pages

  • Lab report: Extraction

    Lab report for Experiment #2: Extraction Your Name: Name of TA: Lab Partner’s Name: Lab Section: Title: Experiment #2: Extraction Purpose: What is the purpose of this lab? In your OWN words! Observations: Weighed out 3.2568 grams of chemical mixture that was yellow in color. Dissolved dry chemicals in 38 ml CH2Cl2 with gentle heating. Poured the yellow solution into sep funnel. Added 10 ml CH2Cl2 to flask to rinse, poured solution into sep funnel. Added 15 ml 3 M...

    Acid, Acid–base reaction, Alkali 815  Words | 4  Pages

  • Dna Extraction Lab Report

    Tan 1 DNA EXTRACTION Aim : To extract the DNA from an egg yolk using various enzymes and to compare with other groups the most effective way to extract DNA. Hypothesis : To be able to observe white springy substances after mixing with enzyme and alcohol. Apparatus : -Test tube, spatula, glass rod, dropper, beaker, test tube rack, skewer. Materials : - 1 egg, meat tenderizer, salt, water , soap, isopropyl alcohol 91%, pineapple juice. Variables : Manipulated Variable : Responding...

    Cell, Concentration, DNA 1627  Words | 7  Pages

  • Isolation of Caffeine from tea leaves

    Organic Chem. Lab EXPERIMENT 11: ISOLATION OF CAFFEINE FROM TEA LEAVES COMPOUND PROCEDURE Preparation of Tea Solution: We started out experiment by weighing out 5.023g of tealeaves and 2.008g of calcium carbonate powder. These two substances were mixed with 50ml of water and heated under gentle reflux in a round-bottom flask using a condenser apparatus. The hot solution was then filtered and the filtrate was collected and cooled. Extraction and Drying: ...

    Benzene, Caffeine, Distillation 1341  Words | 5  Pages

  • Extraction and Sublimation of Caffeine

     Extraction and Sublimation of Caffeine from Tea Leaves By: Ashley Barnes CH 236 – P8 Experiment 4 & 4.5 Due: 10/15/2014 Table 1. Table of Reagents Discussion The extraction yield refers to the percent of caffeine in the tea leaves at start of the extraction experiment. Tea leaves had 0.55 grams of mass per eight ounce serving. The weight of the extracted crude caffeine was 0.264 grams. Therefore, the extraction yield was 48%. This means that we pulled out almost half of...

    Caffeine, Extraction, Gas 906  Words | 5  Pages

  • Isolation of Caffeine from Tea

    Experiment # 1 Isolation of Caffeine from Tea I. Introduction Organic compound can be separated and can be obtained from a mixture of compounds by chemical, physical or mechanical means using the process called Extraction. One or more of the mixture compounds can selectively dissolve into an appropriate solvent in the process of extraction where dissolved compounds is referred to as Extract. The experiment comprises the solid-liquid extraction, the liquid-liquid extraction and distillation. The...

    Chemistry, Ethanol, Evaporation 1248  Words | 5  Pages

  • Decaffeination of Coffee

    Abstract Coffee is the third most popular beverage in the world after tea and water. However, the caffeine within coffee prevents some people from enjoying the strength, taste, and aroma that this beverage has to offer. In the past century, a new market for decaffeinated coffee has arisen, and the technology to develop this product has evolved. Over time, this technology has become more effective in removing a greater percentage of caffeine, while preserving more of the coffee’s flavour. Because...

    Caffeine, Carbon dioxide, Coffee 1556  Words | 6  Pages

  • Extraction of Trimyristin From Nutmeg Lab Report 092614 Organic Chemistry

    Organic Chemistry I – CHEM 201-DL01 September 26, 2014 Organic Chemistry Experiment 4B Lab Report Extraction of Organic Compounds From Natural Sources: Extraction of Trimyristin From Nutmeg Introduction The purpose of this experiment is to illustrate how a solid natural product can be extracted from its natural source through the use of an organic solvent. Natural products are organic compounds that are synthesized by natural biological processes in plants, animals...

    Chemical compound, Chemistry, Experiment 682  Words | 3  Pages

  • Caffeine Extraction from Nature's Pride Tea

    Result of Extraction Weight (g) Tea Leaves 5.5783 Crude Caffeine 0.0246 Empty Beaker 117.5350 Beaker + Crude Caffeine 117.5596 The table above shows the weight of the sample tea leaves, the crude caffeine content in the sample, the empty beaker used in the extraction, and the beaker with the crude caffeine. It is induced from there that for that amount of sample tea leaves, which is equivalent to three bags of Nature’s Pride Tea; there is a 0.0246 g content of crude caffeine for every...

    Antioxidant, Caffeine, Catechin 831  Words | 4  Pages

  • Extraction

    EXTRACTION Organic Chemistry Laboratory This experiment was conducted in order to compare single and multiple extraction of caffeine from dried tea leaves and to calculate the percentage yield of caffeine for both extraction procedures. The group was assigned to do the multiple extraction. Before the extraction proper, the water bath containing the anhydrous sodium carbonate and distilled water was heated. As the sodium carbonate dissolves, tea leaves were added in the mixture and allowed to...

    Caffeine, Chemistry, Concentration 646  Words | 3  Pages

  • Lab Report

    Radish Seed Lab Report Problem: What caffeinated drink (monster, coffee, or green tea) will the radish seeds grow in the best form over a nine day period? Hypothesis: If the radish seeds put in the dish with the drink Monster, then the seeds will grow faster because of the amount of energy given to them. The amount of caffeine in Coffee is much greater than the amount in green tea and Monster, but neither coffee nor green tea contains any extra type of an energy booster like the Monster does. ...

    Caffeine, Coffee, Embryo 700  Words | 3  Pages

  • Extraction Lab

    Experiment 2: Extraction – Evaluation Summary Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references. ** Deductions for hand written report/structures and exceeding page limit ** Report Breakdown Data/Results: _________________ /10 Discussion: _________________ /10 Report Total: _________________ /20 Other Lab Marks Performance:...

    Chemical polarity, Ethanol, Fatty acid 501  Words | 3  Pages

  • Caffeine extraction

    extract caffeine from tea powder using polar - nonpolar solvent extraction technique. Theory:   The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more...

    Black tea, Caffeine, Coffee 2952  Words | 10  Pages

  • Strawberry Dna Extraction Lab

    Strawberry DNA Extraction Donovan Roberts Mrs. Caudill Honors Biology 3/7/11 Introduction The structure of DNA is made of nitrogenous bases, phosphate groups, and sugars. These three parts of DNA form hydrogen bonds and create a right-handed double helix. The location of DNA in a eukaryotic cell is found within the nucleus, bound to proteins. DNA can be extracted from within the cell. They are several steps you must take to retrieve DNA from within the cell. When extracting DNA cells...

    Bacteria, Cell, Cell nucleus 667  Words | 3  Pages

  • Coffee - Research Report

    Coffee Coffee is the most popular beverage in the world today. There are many businesses, such as Dunkin Donuts and Starbucks, which are successful due to the popularity of coffee, and numerous people are employed in the coffee business because of it. For some people, coffee is an aid to get through a long day, while for others coffee is just a good way to relax with a friend. However, modern coffee and its affects differ greatly from when it was first introduced. According to legend...

    Caffeine, Coffea, Coffee 2300  Words | 6  Pages

  • Extraction of Caffaine

    SINGLE EXTRACTION OF CAFFEINE FROM TEA LEAVES Anne Jillian M. Castillo ABSTRACT In this experiment, the technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into an appropriate solvent []. Tea leaves were boiled in distilled water with anhydrous sodium carbonate in order to precipitate the tannins. The tea extract was then placed into a separatory funnel with dichloromethane...

    Caffeine, Chemistry, Coffee 1212  Words | 6  Pages

  • Isolation of Caffeine from a Tea Bag

    Experiment 11b: Isolation of Caffeine from a Tea Bag October 12,2012 Purpose: The objective of this experiment is to extract caffeine from tea bags using the method of extraction. After the caffeine is extracted it is then compared to the nutritional facts amount per serving on the tea bags box. Supplies: Glassware: 1. 50.0 m L graduated cylinder 2. 150.0 mL beaker 3. 2-glass stirring rod 4. 6-test tubes 5. 2-glass pipettes 6. 2-50.0 mL Erlenmeyer flasks 7. glass funnel Hardware: ...

    Caffeine, Erlenmeyer flask, Fleaker 1774  Words | 6  Pages

  • Isolation of caffeine from tea leave

    Isolation of caffeine from tea leave Abstract:- Introduction:- Caffeine is probably the most commonly used addictive drug. This drug is found in a number of things ingested by people. It belongs to a group of nitrogen bases called purines. Because caffeine possesses these base-like properties, it is described as an alkaloid. They usually taste bitter and often are physiologically active in humans. The structure of caffeine is shown below. Figure 1: Structure of Caffeine In this experiment...

    Caffeine, Chemical substance, Chemistry 699  Words | 2  Pages

  • Isolation of Caffeine from Tea Leaves using Multiple Liquid-Liquid Extraction

    ABSTRACT This study is about the isolation of caffeine from tea leaves in Lipton tea bags using the multiple extraction method. The objective of this study is to differentiate simple extraction from multiple extraction method and to obtain the percentage yield of caffeine for both extraction methods. Ten grams of tea leaves was boiled in a solution of 4.4 g of anhydrous sodium carbonate and 100 mL of distilled water. From this solution, caffeine was extracted using 60 mL of dichloromethane which...

    Caffeine, Chemistry, Liquid-liquid extraction 1346  Words | 5  Pages

  • Coffee and Caffeine Related Products

    the product caffeine. Thesis Statement: there are numerous side effects and health problems associated with caffeine. Caffeine should not be consumed to “energize”. Many often turn to caffeine to help, and doing so will lead you to become addicted to the substance much like a drug and will affect many aspects of your everyday life. Introduction: I. How many of you have used caffeine related products to boost yourself in the morning or before a major task for the day? II. Caffeine seems like...

    Addiction, Caffeine, Coca-Cola 1242  Words | 5  Pages

  • DNA Extraction Lab Report

    Biotechnology Lab Report Lab: Extracting DNA from Bananas and Strawberries Purpose: To properly and successfully extract DNA from various fruits using cell disruption and separation techniques. Materials Used: 2 heavy duty zip-lock baggie 1 strawberry (fresh or frozen and thawed) 1 banana half 10 ml DNA extraction buffer* 2 Coffee filters Ice cold 95% ethanol 1 small beaker 2 Test tubes Wooden coffee stirrer *To make the extraction buffer, 100 ml of shampoo (without conditioner) was mixed...

    Bacteria, Cell, Cell membrane 549  Words | 2  Pages

  • Extraction

    Organic Lab Report Extraction Separation of a Carboxylic Acid, a Phenol, and a Neutral Substance Purpose The objective of the experiment is to identify the three substances in the mixture and to determine the percent recovery of each from the mixture. The unknown will consist of either benzoic acid or 2-chlorobenzoic acid, 4-t-butyl phenol. Determine the weight of crystals and also the percent yield Introduction There are various techniques of extractions, solid/liquid...

    Acetic acid, Benzene, Carboxylic acid 550  Words | 3  Pages

  • Isolation of Caffeine from Tea Leaves

    Isolation of Caffeine from Tea Leaves Introduction Caffeine is a member of the class of compounds organic chemists call alkaloids. Alkaloids are nitrogencontaining basic compounds that are found in plants. They usually taste bitter and often are physiologically active in humans. The names of some of these compounds are familiar to you even if the structures aren’t: nicotine, morphine, strychnine, and cocaine. The role or roles these compounds play in the life of the plants in which they are found...

    Black tea, Caffeine, Camellia sinensis 1818  Words | 5  Pages

  • caffeine

    Evidence Homework #1 Topic: Caffeine Preview: Every morning when I wake up the first thing I do after brushing my teeth is walk straight to the coffee pot. I pour myself a hot rich cup of coffee to start the day off. On my way out the door I grab my go cup and fill it up. When I finally get to school I get myself another cup of coffee. How many miller grams of caffeine do you think I have drank at this point? According to the Mayo Clinic a healthy amount of caffeine for an adult is 200 to 300 miller...

    Caffeine, Central nervous system, Coca-Cola 966  Words | 3  Pages

  • Caffeine

    ISOLATION OF CAFFEINE FROM TEA In this experiment you will isolate caffeine from tea leaves and prepare the salicylate derivative. Introduction This experiment illustrates the isolation of a naturally occurring product from plant material -- caffeine from tea leaves. The experiment will provide experience in handling relatively small amounts of material and at the same time you will be exposed to several techniques and procedures which are fundamental for survival in an organic chemistry lab. You...

    Caffeine, Chemistry, Coffee 1680  Words | 9  Pages

  • Organic Chem 1 Post Lab Report

    Post Lab Report Experiment 3 - Chromatography – Analyzing Analgesics by TLC and Isolation of β–Carotene by Column Chromatography Chemicals 1. Acetaminophen (C8H9NO2) 2. Aspirin (C9H8O4) 3. Caffeine (C8H10N4O2) 4. Ibuprofen (C13hH18O2) Introduction In this experiment, several analgesics were analyzed by Thin Layer Chromatography (TLC) and the composition of an unknown tablet was identified. We define chromatography as the separation of two or more compounds or ions by...

    Aspirin, Chromatography, Expanded bed adsorption 842  Words | 4  Pages

  • DNA extraction lab

    DNA Extraction of a Musa acuminata Biology Lab Report \Analyze and Interpret A number of steps are required to isolate DNA from cellular contents. Describe what happens at each step, and why it acts to separate the parts of the cell. /6 There are three specific steps required to isolate DNA from its cellular contents. The steps used to remove and expose DNA from its cell are: breaking down the food type you are using by crushing it, for example a banana or strawberries, exposing the substance...

    Bacteria, Cell, Cell membrane 1830  Words | 3  Pages

  • Caffeine

    Caffeine in the diet Email this page to a friend Bookmark & Share Printer-friendly version Caffeine is a substance that is found in certain plants. It can also be man-made (produced synthetically) and then added to food products. It is a central nervous system stimulant and a diuretic (substance that helps rid your body of fluids). Function Caffeine is absorbed and passes quickly into the brain. It does not collect in the bloodstream or get stored in the body. It leaves the body in...

    Caffeine, Coca-Cola, Coffee 1322  Words | 6  Pages

  • Lab Report

    Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal, procedure, data analysis method, and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report, a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual, grammatical, typographical...

    Chemistry, Erlenmeyer flask, Error 1317  Words | 5  Pages

  • Strawberry Extraction Lab

    Berry DNA Extraction Lab I. Problem Statement: Successfully extracting the DNA from strawberries. II. Background info: DNA is the genetic information in organisms that codes for proteins, and controls the cells function. The DNA is a double helix molecule that is formed by various nucleotides which include Adenine, Thymine, Guanine, and Cytosine with sugar phosphate. Different organisms can have larger or smaller genes. DNA is also what makes up chromosomes during cell replication. Strawberries...

    DNA, DNA nanotechnology, Eye 745  Words | 3  Pages

  • Physics Lab Report Cooling Coffee

    Cooling Coffee Name: Diana Rusina Date:23.11.12 In this practical, you will be assessed on Design, Data Processing & Presentation and Conclusion & Evaluation – Read the checklist of the criteria for guidance. Introduction: It is Saturday afternoon. You brew yourself a cup of coffee and are just about to pour cold milk into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few minutes this afternoon. If you want to have your...

    Conclusion, Data, Decimal 1449  Words | 7  Pages

  • Extraction of Caffeine from Tea leaves

    of alkaloid caffeine from tea leaves Date Submitted: September 3, 2014 Abstract Caffeine is one of the main constituents of tea leaves. In this experiment, 0.0039 g of pure caffeine was isolated from tea leaves. This was done through solid-liquid extraction followed by multiple liquid-liquid extraction. Then crude material obtained was then purified by sublimation. The isolated caffeine was subjected to thin layer chromatography (TLC) together with a standard caffeine. The Rf value...

    Benzene, Caffeine, Coffee 1976  Words | 5  Pages

  • LAB REPORT

    Institute Physics Course 2014 - Rocket Lab Report Title: RockSim and Electronic Altimeter Measurement Techniques Name: Scarlet Henriquez Email: scarletpatricia94@aol.com LAB SESSION ___8____Assignment _____7_____ Due Date: ___7/8/14______ Objective: Launch a smaller rocket to learn how to compare RockSim predictions (computer based) to an actual instrument measurement carried by the rocket (Electronic Altimeter). This Lab shows how better the electronic measurement...

    Aircraft, Altimeter, Calculation 401  Words | 8  Pages

  • lab reports

    Writing Laboratory Reports Lab reports for Biology may seem different than other classes you have taken. As you progress further in science, you will see variations in styles of lab reports, though they all contain the same basic principles. Lab report sections are as follows: Cover Page Introduction Objective Materials and Procedures Results/Data Conclusions Works Cited **Not every lab report will contain every section. I will give you specific instructions for each lab write-up** ...

    Scientific method 1210  Words | 5  Pages

  • Chemistry of Coffee

    Chemistry of Coffee Green Coffee- Before coffee is roasted, it is referred to as “green coffee”. The green coffee is primarily made up of caffeine, lipids, carbohydrates, proteins (amino acids), and organic acids (although inorganic acids exist in coffee as well). These groups are quite stable in the green phase, and it is the carbohydrates, proteins, and acids that will undergo significant reactions during roasting to produce coffee. The important groups of carbohydrates in beans are from the monosaccharides...

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