Cellulose And Caffeine Lab Report

Pure caffeine is a white powder, like what is found in caffeine pills, and is “a plant-based alkaloid which

5.    Prepare the caffeine solution by dissolving 10g of caffeine tablets in 100ml of water in a beaker. Label the beaker ‘caffeine’. Similarly, add 10g of coffee to 100ml of water in another beaker and label it ‘coffee’.

Various countries consumed caffeine containing plants as a source of energy in the past, while still being unaware that the compound within the plants was causing the stimulating effects. In 1819, Friedlieb Runge discovered and isolated caffeine, which gave rise to the production of new caffeine containing products. Most individuals today consume caffeine in the form of coffee because of its’ ability to decrease fatigue and drowsiness. Although caffeine is soluble in water at room temperature, the molecules will not completely dissolve; therefore, coffee is made with hot water to dissolve a greater quantity of the caffeine molecules. Caffeine produces its’ stimulating effect by interfering with adenosine, a chemical in the nervous system that releases signals to notify the body when sleep is needed. Adenosine is a by-product of brain function and it will accumulate in the body throughout the day. Eventually adenosine levels will reach a maximum, causing adenosine to start binding to receptor sites to notify the brain to slow down cellular activity. Caffeine and adenosine are both alkaloids (organic compounds composed of many nitrogen atoms) with similar shapes, ring structures and covalent bonds, which allows caffeine to bind to adenosine receptors. Caffeine will occupy all adenosine receptor sites, causing the brain to maintain cellular activity and not induce

Isolation of a Natural product, in the experiment caffeine [C8H10N4O2], is based on a series of procedures. Firstly, it is important to examine the structure of caffeine which is an alkaloid. Typically alkaloids are nitrogen based and found in plants, caffeine itself is composed of a purine ring with functional groups of a amide, amine and alkene respectively. Furthermore, Caffeine includeds a lone pair on the nitrogen atom asserting several functional properties(Zhao et al. 206). Under examination of the caffeine structure several intermolecular forces are present including hyrdogen bonding, dipole dipole forces and Van der Waals forces. What this indicates is that caffeine is a polar molecule and reacts moderatley hydrophobically in the

It comes from the cacao plant. It has a similar effect to caffeine and is found in chocolate and many other foods.

Based on my data, I think my isolation was somewhat of a success and in some ways not. I was able to obtain a pure recovery from the crude caffeine of 21.46%. It is not significant amount, but it seemed to be enough. A reason for some loss in my data was that some of the crystals were lost in the process of removing the inner tube. In addition, although I was unable to perform the NMR, I perform the IR, but my spectra resemble more like a blank. I obtain 0.05 grams of pure crystal caffeine but it could be that during my removable of the inner tube that when both of the tube accidently bumped that I lost some of the crystals, which resulted in not enough caffeine for me to get an IR spectra with all the peaks.

Caffeine is a “naturally occurring chemical stimulant called trimethylxanthine” that presents itself much like other drugs such as heroin and cocaine (Brian). The buzz after a cup of coffee is an example of the similar properties. Caffeine “easily passes through body membranes” and enters the bloodstream

Isolation of Natural Products: Caffeine from Black Tea Purpose: The purpose of the caffeine lab is to extract caffeine from the solid black tea. This experiment involved two steps process; the first step includes solid-liquid extraction followed by the second step, which included liquid-liquid extraction to separate caffeine from water solution using sublimation. Procedure: Begin by emptying eight tea bags into a weighted boat and then weighting it.

The caffeine was extracted from the tea by adding sodium carbonate and dichloromethane into the tea solution and then separating the dichloromethane from the tea by using a funnel and filtering it through. The next step was evaporating the solvent, the dichloromethane (which contained the caffeine), using a hot plate under the hood. After the dichloromethane was evaporated, the mass of the caffeine was calculated by using a top-loading scale and converting the grams into mg/100-ml. The second experiment was separating the components in colored markers by using chromatography. The solvents used were isopropanol, methanol, and water.

Caffeine is a good source of energy. People drink caffeine such as coffee and energy drinks to help them stay awake and get throughout their day. Caffeine is a naturally occurring chemical stimulant called Trimethylxanthine. The chemical formula for caffeine is C8H10N402. There are many different types of caffeine. It is used in many different ways and is in the food and drinks we digest today.

     Tea is made from young leaves and leaf buds of a type of evergreen plant

Caffeine works by binding itself to the chemical element, adenosine. Adenosine works as a natural depressant in the body, preparing your body for rest. When caffeine binds to adenosine, it excites the cell and blocks the absorption of adenosine into the brain. This causes the rush of energy many people rely on to stay awake. However, high usage of caffeine will result in the brain producing more adenosine to counter the stimulant. Because of the extra production of adenosine, tolerance is built; this means more doses of caffeine will have to

Caffeine is a common central nervous system stimulant drug which occurs in nature as part of the coffee, tea, yerba mate and other plants, can be said to be the most psychoactive substance in the world. ( Fredholm et al. 1999). It is also an additive in many consumer products, most notably beverages advertised as energy drinks. Caffeine can also be found in soft drinks such as Coca-Cola and Pepsi, where, on the ingredients listing, it is designated as a flavouring agent. It is regarded as the most widely consumed stimulant drug in the world based on Nehlig, Daval, & Debry (1992) research. The interaction of caffeine with adenosine receptors in the brains makes an individual more alert. A moderate intake of caffeine results in small healthy

2. Likewise, teas of all assortments additionally contain abnormal amounts of cell reinforcement polyphenols that

The method used to separate the organic compound from a mixture of compound is the extraction. It is done by the dissolving of one or more compounds in a good solvent. The solvent which was used in this experiment was 15 ml of dichloromethane into 125ml of water. Caffeine was extracted from 9.19 g of TAZO Awake English Breakfast. Caffeine is soluble in water in 2.2 g/ml at 20 C; it is more soluble than dichloromethane which has 10.2g/ml at 20 C, and the method used for the extraction was the liquid-liquid extraction method, followed by evaporation. The objective of going through all these steps was to be able to obtain caffeine from tea and to see how pure or how the caffeine was not pure in comparing the standard values of Melt Point and RF values of the result of the experiment.