Category : Chemisty

Synthesis and Analysis of a Ferric Oxalate Salt

By: Omish Samaroo Introduction The purpose of this lab is as follows: 1) to learn about coordination compounds through the synthesis and analysis of a potassium ferrioxalate hydrate salt and 2) to use the techniques developed in previous labs to determine the empirical formula of the ferrioxalate salt. The ferrioxalate salt has the empirical formula Kx[Fey(C2O4)z]•nH2O. The values of x, y, z, and n are ascertained through determining the percentages of K, Fe, C­2O42-, and H2O; converting these percentages to […]

Chromatogram Student Experiement

By: Ciaran Forde and Catherine Garbutt ABSTRACT: All projects must be accompanied by an abstract. The abstract should briefly state the problem or purpose of the research, indicate the theoretical or experimental plan used, summarize the principal findings, and point out the major conclusions. Abstract length is one paragraph. INTRODUCTION: RESULTS & DISCUSSION: After analysis of the chromatograms obtained in the separation of solutions AP and PC we decided that the 70% pH 3.5 buffer with 30% methanol gave the […]

Quantum Dot Nanocrystals Experiment

By: David Gould Partners: Alaina Nunn, Stephanie Bolini CHEM 322L | February 17, 2014 – Quantum Dot Abstract: This experiment works to determine how quantum dots are prepared in a laboratory setting, and their analysis spectroscopically. With uses as semiconductors in the electronic industry, quantum dots perform faster due to their small size. Being so small these nanoparticles do not obey the laws of classical physics and must be studied in the quantum realm. Various quantum mechanical models are discussed and it […]

Determining the pKa of Bromothymol Blue by spectrophotometry

James Robertson Chemistry 2220 Determining the pKa of Bromothymol Blue by spectrophotometry Abstract To determine the pKa of an acid-base indicator, specifically bromothymol blue, different amounts of both 0.1M NaOH and 0.1 M HCl were added to a solution of fixed concentration of bromothymol blue and the pH was monitored via pH meter. At different pH readings around the researched pKa of Bromothymol blue we measured absorbance of the buffer solution. By superimposing the absorbance graphs, two wavelengths of absorbance […]

High-Throughput Experimentation: Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling

By: Jingyuan Ma Introduction This lab introduced techniques used in the Penn/Merck High-Throughput Experimentation Center. The Suzuki-Miyaura reaction was implemented using 4 reagents, an assigned inorganic base, an assigned solvent, and pre-dosed phosphine ligands. TLC and HPLC were used to qualitatively analyze the reactivity trends of 24 reaction screens, which were all conducted under room temperature and controlled settings. The following overall reaction was conducted to catalyze sp2-sp2 carbon-carbon bonding through the use of a palladium catalyst: The following is […]


I. Purpose To study how stress affects a system’s equilibrium and to determine the concentration of the complex ion in solutions of unknown concentration as well as the equilibrium constant. Procedure LeChatelier’s Principle Part 1 Solid sodium chloride was poured into a test tube and the test tube was then filled ¾ full of distilled water.  The solution was then decanted into a second test tube and Cl– ions in the form of concentrated HCl were added. Part 2 A […]