and then compare its melt point to the two other possible substances. Theory Panacetin should be made up of about 50 percent of the unknown component that we previously separated out of Panacetin for testing. We suspect that this unknown compound is either acetanilide or phenacetin. From the solubility of acetaminophen and phenacetin, we could know both of them are relatively soluble in boiling water but insoluble in cold water so that we took the recrystallization as the method to purifying
Jake Bodway TA: Benjamin Pollard Experiment 4: Recrystallization of Pure Phthalic Acid, Benzoic Acid and Naphthalene Introduction Section Recrystallization is a technique frequently used in organic chemistry to purify solid organic compounds. The goal of this technique is to allow organic compounds to form crystal lattice structures, and to remove any of the impurities that do not align within this crystal structure.1 The theory behind recrystallization revolves around entropy; as heat will cause a
Recrystallization and Identification of Unknown Arsalan Kouser Chemistry 2270 Laboratory, Section 18 Instructor: Kyle Fulle October 8, 2014 Abstract In this laboratory project, Compound “E” was identified as N-Phenylsuccinimide. The % yield was 60.5 %. The melting point of both Compound “E” and N-Phenylsuccinimide was 153-154 ⁰C, as verified through experimentation; the official melting point range of N-Phenylsuccinimide is 153-157 ⁰C. The yield of dibromobenzene
goal for recrystallizing crude cinnamic acid was to purify the acid and filter out any impurities. Recrystallization is one method used to purify a compound. Using a hot solvent, the compound is dissolved. It is then cooled to produce pure crystals. “As the crystal develops, impurities are excluded from the crystal lattice, thereby completing the purification process.”1 The key to recrystallization is the solvent used. “The solute must be relatively insoluble in the solvent at room temperature but
The Recrystallization of Benzoic Acid through solubility and filtration. Summary: An ideal solvent of 95% Ethanol was determined from the given solvents of water, 95% ethanol and hexane. Once the ideal solvent was determined a recovery of 27% or 0.54 grams of Benzoic Acid from 2.0 grams of crude Benzoic Acid mix using the 95% ethanol. The product was a white crystalline solid that produced a melting point range of 116-120 C compared to the actual range of 121-123 C meaning that a small amount of
extraction from a mixture containing benzoic acid, cellulose, and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have a lower and wider melting point range. The experiment performed was important because it provides important knowledge
Experiment 1: Recrystallization – Evaluation Summary Last Name: Xavier First Name: Jessica Date: October 1st 2013 Lab Day/TA/Group: Wednesday(1:35pm)/Group A 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: _________________
Experiment 4: Recrystallization of Pure Phthalic Acid, Benzoic Acid, and Naphthalene Charles Nyberg Gilbert Immanuel and Rachel Zigelsky Mussie Gide Introduction Chemical experiments are often described, when they are finished, by the yield or recovery of the target product or solid. Also melting point can be tested to determine purity in a compound. Most times these chemicals are not completely pure so they can be recrystallized to remove the impurities. The technique of recrystallization learned and
possible unknown acids were 2-chlorobenzoic acid, 3-chlorobenzoic acid, and 3-methylbenzoic acid. The purification of the isolated unknown acid was performed by recrystallization and its identity was established by analyzing the melting point range of the pure product and comparing it to the provided standards. In addition, a mixed melting point experimentation enhanced the fidelity of the unknown's
resulting in the substitution of a proton with a functional group. The electrophilic aromatic substitution reaction nitration is used to nitrate methyl benzoate and acetanilide with a nitronium ion. Crystallization was used to purify the product. The melting point was used to determine its purity and the regiochemistry of the products. The methyl benzoate reaction product, methyl nitrobenzoate, was determined to be meta-substituted and the acetanilide reaction product, nitroacetanilide, was determined to