Funnel Stopper Methods In this experiment the caffeine is extracted from tea leaves by hot water. From the aqueous extract the caffeine is isolated by multiple extractions with small portions of disintermediation. In a 500 ml Erlenmeyer flask we placed one tea bag, which weighed 1. Egg, along with 30 ml of ODL water, and 2 grams of powdered calcium carbonate. After boiling the mixture gently for 20 minutes, occasionally swirling it, the hot solution is allowed to cool and the caffeine is then extracted from the water with disintermediation, which is an organic solvent that s insoluble in water.
The next step was to transfer the tea extract from the 500 ml Erlenmeyer flask too 125 ml separate funnel that is supported by a ring on a ring stand. We added 15 mil’s of DC to the funnel and shaken the solution gently three times to release any pressure that may have built up in the funnel. There were two different layers. We drained the lower (DC) layer into a 50 ml beaker. We stored the beaker and resumed the experiment a week later. The next week we took out the beaker and boiled it on a hot plate. During this process we covered the beaker with a wash glass that was filled with ice.
After it had boiled we recovered the caffeine on the wash glass. Results After finishing up the experiment a week later, we were able to retrieve some caffeine on the wash glass. Even though it wasn’t very much, the aroma of the caffeine was very strong which is how we were able to tell. Discussion The reason why we were able to collect any caffeine is because as the disintermediation becomes hot and vaporizes (boils), the disintermediation vapor ill travel into the cool wash glass where the ice was sitting on.
The caffeine should not vaporize and travel with the disintermediation. Rather, it should be left behind in the wash glass. Conclusion Extraction is a process that can be used to determine the content of a certain substance within a solution. However, each extraction process is different. To take only one example, the extraction of Caffeine from various substances, such as tea, coffee, and Coca Cola, requires different extraction techniques, since the composition of the solution is different in each case.
Sublimation on the other hand, is a process which must be completed in a very specific order. In addition to its three main steps of the setup, sublimation, and retrieval, many small factors may determine how much product has been obtained, and how well it has been purified.