Written by Rachel Buckley Abstract This experiment, Enthalpy of Hydration, is used to calculate the enthalpy of hydration of magnesium sulfate by measuring the temperature change of both anhydrous magnesium sulfate and hydrated magnesium sulfate when they are added separately to two different calorimeters and allowed to react. The results are then used to calculate the enthalpy of hydration. Methods and Materials First, one sample of anhydrous, between 7 and 8 grams, and one sample of hydrate, between 15.3 and […]
Written by: Ryan Castellente Abstract An acylation reaction was performed reacting benzene with acetyl chloride, resulting in the 61% yield of acetophenone. An aldol condensation reaction reacted the acetophenone with 4-bromobenzaldehyde. This reaction produced 65% yield of 4-bromochalcone. A bromination reaction was performed on the 4-bromochalcone, resulting in a 76% yield of 2,3-dibromo-3-(4-bromophenyl)-1-phenylpropan-1-one. The final reaction formed an isoxazole ring, resulting in a 95% yield of 3-(4-bromophenyl)-5-phenylisoxazole. The synthesis scheme is seen below. Introduction Isoxazoles have been of interest to […]
Written by Elizabeth Data: Table 1: Measured Cell Potential Values Ecell (V) Cu/Zn 0.920 V Cu/Pb 0.646 V Zn/Pb 0.423 V Table 2: Cell Potential Values for Reduction Half Reactions Ered (V) Cu2+ + 2e– –> Cu 0.34 V Zn2+ + 2e– –> Zn -0.58 V Pb2+ + 2e– –> Pb -0.31 V Table 3: Elements of Cu/Pb Cell in Thermodynamic Study Temp (°C) Temp (K) ΔGrxn (kJ) Ecell (V) 76.0 °C 349 K -157.8 kJ 0.818 V 66.0 °C 339 K -158.8 kJ 0.823 V 56.0 […]
Written by Alex Abstract The purpose of this experiment is to determine the electron energy transitions on Europium and Terbium complexes with tmh. This was determined by finding the wavelengths of the peaks in an emission spectrum of those complexes. It was found that the largest peak of the Europium complex was at 614 nm, and the largest peak of the Terbium complex was at 547 nm. Introduction In order to understand photochemistry, one must understand the basics of atomic […]
Purpose The purpose of this lab was to synthesize Aspirin and measure the synthesized Aspirin’s purity. By calculating the theoretical yield based on the original amount of Salicylic acid, one could determine the actual yield percentage of the reaction. By measuring the melting point of the synthesized substance as well as taking a UV spectroscopy, it is then possible to measure the purity of the synthesized compound as well. With the yield percentage and the purity of the product, one […]
