Experiment six included both stoichiometry and the percent yield. Throughout the experiment, we were interested in the end product but also with the efficiency of the operation (p. 89). This is most accurately known as the percent yield, which is the actual yield over the theoretical yield multiplied by 100. This will give you the percent yield (p. 89). Stoichiometry is a part of chemistry that deals with the calculations of molar masses of reactants and products within a chemical reaction. Stoichiometry
of Yield of a Single Displacement Reaction Purpose: To determine the % of yield of the reaction of copper sulphate and iron with water, in order to learn to use and apply theoretical and actual yield into real life scenarios. Hypothesis: I believe that the mass of the actual yield will be lower than the mass of the theoretical yield because of the decanting. This process can make the precipitate leave the beaker and fall into the sink. Procedure: Refer to handout Lab: Finding the % of Yield of a
---H3PO4-→ CH3CO2C6H4CO2H + CH3COOH The purpose of the lab is to create aspirin using recrystallization and validate its purity by determined by reaction of the product with Fe^+3. The hypothesis is that the aspirin was pure. Recrystallization is a way to separate; the object is to accumulate one part of a solid mixture that is pure and not contaminated from the rest of the mixture. According to Experiment 5: Synthesis of Aspirin in the General Chemistry Lab Manual, there are three steps for
The main objective of this lab is to properly perform the method recrystallization 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
E4 Synthesis of Aspirin and Oil of Wintergreen 10-2-15 Introduction Many everyday products are primarily comprised of organic molecules. Aspirin and the oil of wintergreen are esters, which is an organic compound that contains molecular connectivity. The esters usually have a pleasant and inviting aroma to them. Esters are used in cosmetics, perfumes, food, and pharmaceutical industry. Aspirin is the most used medication used worldwide. Aspirin is the common name for the compound acetylsalicylic
substance from the solid phase to the gas phase without a liquid phase. By utilizing sublimation and temperature changes to crystallize caffeine crystals, the crystals are purified. IR spectroscopy is a technique used primarily in organic chemistry labs in order to help identify a compound. IR spectroscopy involves shining infrared light at a molecule and measuring how the molecule reacts to the light. The infrared light produces vibrations in the bonds of a molecule which are called bends or stretches
students with basic yet critical techniques needed to further pursue a career in the science field. The goal for Chemistry 1212K lab was to determine the unknown formula of a synthesized cobalt-ammonia-halide product through a combination of experiments. The only way to calculate the particular chemical relationship was through finding the percent Cobalt, percent ammonia, and percent halide (either Cl- or Br-) and comparing the experimental results to the theoretical values located in the manual. The formula
possible. This crystallization was much more successful, obtaining a percent yield of 79%.
Abstract: In this experiment an ester was prepared from a mixture of 2-methyl-2-butanol (C5H12O) and acetic acid (C2H4O2) combined with a small amount of sulfuric acid (H2SO4) as the catalyst in the reaction. The yield of the ester product was forty-four point sixty percent. The spectral analysis results included peaks at 1700 and 2900 cm-1; which indicate the presence of an ester and an alkane within the structure. Introduction: Figure 1a: Mechanism for Fisher Esterification.
are used to separate basic compounds from organic mixtures. Amines, organic salts, are converted into salts, which can then be dissolved in water and separated. Basic extraction is similar extraction, because adding a carboxylic acid to a base will yield a salt. The acid that was used in this experiment