Aim : In this experiment, aspirin is to be prepared via an esterification reaction and purified through recrystallization. The purity of the synthesised aspirin is determined through melting point determination. Introduction : One of the most widely used medicine is aspirin. It is best known for its pain relief for mild headaches, toothaches and muscle aches. It also acts as a nonsteroidal anti-inflammatory drug by providing relief to the swelling. Salicin, an active ingredient in salicylic acid
The next experiment is to purify impure fluorene, using the same techniques as the previous experiment. In order to crystallize fluorene, the ideal solvent have to be determined from toluene, water, and methyl alcohol. Solubility tests were able to confirm that methyl alcohol is the best solution for crystallizing fluorene, as stated in the results. Though methyl alcohol was the best solvent for this experiment, additional solvent was needed to dissolve the fluorene, because methanol has a high evaporating
solvents, such as water, and nonpolar compounds are more likely to dissolve in nonpolar solvents. The most polar bonds have the largest electronegativity difference between the atoms in the bond and the highest boiling points. The attractive forces between polar molecules are dipole forces. These attractive forces of dipoles increase the boiling point. The stronger these forces are, the more the compound must be heated to overcome the attractions, therefore, the higher the melting and boiling points
to purify an impure substance. The recrystallization experiment composed of two parts. The first part consisted of acquiring crude acetanilide, which is an impure substance, and purifying the solid compound through different method. The second part of the experiment required time for the purified acetanilide to recrystallize. The recovered acetanilide was then weighed and its melting point was taken. During the first part of the experiment, about 1.520 grams of crude acetanilide was weighed out
do not mix together and form an immiscible layer. One is usually an aqueous solution that is water or exhibits properties like water such as hydrogen bonding, and the other is and organic solvent that display little to no polarity and Vander Waal forces at best. The discrepancy in polarity causes the separation of solvents, with the more dense solvent on the bottom of the container. In this experiment, this concept is implemented
SEMESTER 1 UDEC1164 ORGANIC CHEMISTRY Name: Cheong Wai See Student ID: 1404057 Practical Group: 1 Title of Experiment: Name of Tutor: Dr. Mohammod Aminuzzaman Date: 24 February 2016 Tiltle: Nitration of Methyl Benzoate Objectives: -To prepare methyl-3-nitrobenzoate from nitration of methyl benzoate by electropilic aromatic substitution. -To calculate the percentage yield and get the melting point of methyl-3-nitrobenzoate. Introduction: Benzene contains compounds have special properties that make
Metals rust when they are in contact with oxygen, and water. They rust much faster when they are in contact with salt water, and acid rain. We chose to see what would happen to various metals when they contacted with salt water. When the electrons move around in the salt water, it causes the metals to rust. The metals we chose were iron, copper, lead, zinc, and aluminum. Those are some of the most commonly used industrial metals. We got the salt water directly from the beach, so that we would get the
When the mixture is sent through the funnel, only insoluble impurities would be filtered out. Once hot filtration is done, the flask is set to cool. When the flask is cooled to room temperature or cool enough to touch, it is then placed in an ice-water bath where crystallization can be seen
Review of literature-Bubble-ology We would be trying to find out which mixture makes the best bubble solution so the bubble will last longer in the air.For the experiment We will use detergent corn syrup glycerin and water.We will used the glass jars to put the bubble solutions.The bubble solutions will be tested outside.We we blow the bubble we will catch it with the want we will make with the pipe cleaners.Finally,while we are testing the bubbles at the same time we will be recording the data
crystallized fat and milk fat collide and build a new network surrounding the air bubbles, holds the air being incorporated into the mixture. Manual whipping imitate the action in ice cream machine, where a bowl of ice water was put surrounding the mixture while whipping with hand mixer to help the water in the mixture to frozen and whips air into the frozen mix at the same time. This action enable the ice cream to contain a considerable quantity of air, up to half of its volume, gives the ice cream its characteristic