purpose of the melting point experiment is to determine the melting point of a solid. The melting point of a solid is the initial temperature when a solid starts changing to a liquid and the final temperature when it completely liquefies. The identification of melting point is used as an experimental technic to identify compounds. When a compound is pure the temperature range is sharp, rather than broad that occurs in impure compounds. In this experiment we determined the melting point by heating a
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
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
This experiment was executed to study the reduction of a ketone to produce a secondary alcohol. This can be seen in Equation 1 below: Using sodium borohydride (NaBH4) as a reducing agent, the starting molecule of 9-fluorenone was reduced to 9-fluorenol. In Equation 2 shown below, the sodium borohydride is used to reduce the C=O bonds to C-OH bonds. The objective of this experiment was to not only reduce 9-fluorenone to 9-fluorenol, but also to analyze the product through melting point
complete the reaction. In this experiment the alkene is norbornene and the product is exo-norborneol: The mechanism involves the formation of a carbocation by addition of a proton to the double bond of norbornene. In the following step, the less sterically hindered side of the carbocation is subjected to the nucleophilic attack of water leading to
INTRODUCTION In this experiment, the technique of liquid-liquid extraction will be used to separate compounds in a mixture using immiscible solvents. Each separated compound will then be evaporated/dried into a solid and used to obtain melting points to identify each compound in the mixture. Throughout experiment, pH levels needed to be managed closely. DATA AND CALCULATIONS PART A MASS OF DRY RECOVERED BENZOIC ACID: 0.0111g MASS OF BENZOIC ACID USED
Sarah Min CHEM 143A: Section A03 A10627548 April 14, 2015 Lab Report 1 - Recrystallization and Identification of Unknown Introduction The main concept in this experiment is recrystallization. Recrystallization is the process where the solute (a crystalline material) is dissolved in a hot solvent. The heated solution is filtered (generally via vacuum or gravity filtration) and is returned back to its solid crystalline state when the solution cools down. Recrystallization is best for isolating and
Name: Richard Perez Experiment Due Date: 9.18.14 Name of your section instructor: Min Fan Section: 239 Recrystallization Introduction The purpose of the experiment is to introduce students to the purification techniques: vacuum filtration and recrystallization, in addition to using the Mel-Temp apparatus for melting point analysis. The task in part A, is to take crude Acetanilide (composed of Acetanilide and two impurities: A & B), and isolate the Acetanilide using the purification techniques.
The purpose of this experiment is to use liquid-liquid extraction to isolate Benzoic Acid, Ethyl-4-aminobenzoate, and 9 Fluoronene. This technique is commonly used to isolate and purify products from a mixture, and also isolate natural products. The type of liquid-liquid extraction that was used in this experiment is acid and base extraction. This type of extraction takes advantage of the chemical properties of the compounds. Acid extractions are used to separate basic compounds from organic mixtures
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