Stoichiometry

Evaluation of L – Proline as a Catalyst for an Asymmetric Aldol Reaction Abstract This reaction is divided into two parts. In the first part acetone, L – proline and 4 – nitrobenzaldehyde are reacted to give (R)-4-hydroxy-4-(4-nitrophenyl)butan-2-one as the major product along with (S)-4-hydroxy-4-(4-nitrophenyl)butan-2-one. The identity of the product is confirmed by IR spectra of the product which gives peaks at 1073.94 cm-1, 1330 cm-1, 1515.05, 1600.13 cm-1, 1708.25 cm-1, 2930.82 cm-1and broad

As a result of the calculations made above the concentration of the pure ASA in the 10.0mL of NaOH in mg/mL, based on the Beer’s Law plot found in figure 1.0 was 0.0978mg/mL. Presumably, the mass (in mg) of pure ASA based on the two consecutive dilutions was approximately 97.8 mg this value is unsuccessfully proven to match the associated theoretical value due to the overall percent yield, which will be discussed further. Also, according to the same calculations made in calculation #1, the calculated

IV. CONCLUSION _ In this experiment, a solution of Na2CO3 was reacted with a solution of CaCl2 to form a precipitate of CaCO3. The theoretical yield of CaCO3 was calculated and then compared to the actual yield of CaCO3. The results suggest that the Theoretical Yield was 4.2246 grams and the Actual Yield was 4.24 grams, which gave a Percent Yield of 100.473% and a Percent Error of 0.473%. The actual yield was greater than the theoretical yield. It is suggested that it was greater than because

After the crude product was collected by crystallization process, it was weighted to be 8.4756 g. it was recrystallized and collected. The weight of pure product was obtained to be 5.772 g In comparison to the theoretical yield of the experiment; it was calculated to be 65.99 % recover and 82% total yield. The melting point (MP) of the product was taken in order to identify the product. 2 trials were performed, and the results of both trials are the same, 102-105oC. The expected product of this experiment

Examining the Percentage Yield of a Chemical Reaction Komal Maan 470883 Ms. Chandan April 28th, 2015   Introduction: Numerous factors can determine the percentage yield of a chemical reaction. Such as the nature of the reaction, the conditions in which the reaction is carried out and the nature of the reactants used in the reaction. In this investigation the percentage yield was to be determined using the following chemical reaction: Fe(s) + CuCl₂ (aq) FeCl₂ (aq) +Cu(s) Steel wool was used

4) Physicochemical properties of the drug Molecular Weight Captopril : C9H15NO3S Molecular weight of atom = C : 12.01 ,H : 1.0 ,N : 14.01 ,O : 16.0 ,S : 32.07 Calculation of molecular weight = (12.01x9) + (1.0x15) + (14.01x1) + (16.0x3) + (32.07x1) = 217.17 g/mol Hydrogen Bond Acceptor (HBA) and Hydrogen Bond Donor (HBD) HBD HBA Figure 1 : Structure of Captopril Hydrogen Bond Acceptor (HBA)

In order to calculate the percent yield, we first had to determine the moles of the limiting reactant, which was anthranilic acid in this case, by dividing the mass of was anthranilic acid we weighted in the beginning of the lab (2.001g) and dividing it with the molar mass of was anthranilic acid. Thus obtaining the value of 0.01456g. Then in order to calculate the theoretical yield, we multiplied the moles of was anthranilic acid with the molar mass of N-acetylanthranilic acid and the mole ration

Nitration of Naphthalene Wed 2/25/2015 Lab report # 1 Abstract: The purpose of this experiment was to nitrate naphthalene with nitronium ion, which is formed at low concentration from a reaction of nitric acid and sulfuric acid. The percent yield from the experiment was 54.4% of the product, and the melting point of the possible results were 59 °C for 1-nitronaphthalene, and 78°C for 2-nitronaphthalene. Introduction: Polynuclear aromatic hydrocarbons such as naphthalene can be nitrated

Title: Working through the Copper Cycle Experiment to Gain Understanding Author Information Lab Partner: Leah Richmond* and Shelby Alred Course: CHEM 111-571 Introduction: During lab, we put the metal copper under different circumstances so that we could gain a better understanding as to what goes on in the copper cycle. Throughout each stage of the copper cycle, we deduced what type of chemical reaction took place based on observation, made observations about the state of the metal and what

Introduction There is a demand for artificial sweeteners because people want to control their intake of sugar. Saccharin, cyclamates, aspartame, as well as Dulcin, are some sugars that fulfill the need for sweeteners to be of low caloric content. Some of the sweeteners, such as Dulcin, are now considered to yield undesirable health effects with long term use. Dulcin is 250 times sweeter than table sugar. The synthesis of Dulcin was done in order to calculate the percent yield. The lesson of this