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Monthly Archives: September 2016

Tie dye

by M. J. Simpson Note: Plan on dressing in old clothes for this lab. These dyes are powerful and may permanently stain your clothes if you splash or drip them on yourself. Tie dye is a classic color chemistry lab. There are many different “recipes” for tie dye, but we will be following the procedure […]

Molecular Modeling – Digital and Analog

adapted by M. J. Simpson from a lab originally by S.F. Sontum, S. Walstrum, and K. Jewett Introduction Theories of chemical bonding allow us to understand the electronic structure and geometrical arrangement of atoms in a molecule or ion. Models provide a useful way of visualizing the arrangement of electrons in a molecule. As you […]

CO2: Enthalpy of Sublimation, Reaction and Metabolism

by S. F. Sontum and K. Jewett (edited by R. Sandwick) Introduction The oxides of carbon could not be more chemically different. Carbon monoxide (CO) is a polar basic gas that binds strongly to metals while carbon dioxide (CO2) is a non-polar gas that reacts with water. Carbon monoxide is produced when hydrocarbons are burned […]

Net Ionic Reactions

adapted by M. J Simpson from a lab originally by S. F. Sontum, K. Jewett and R. Sandwick Learning goals: work collaboratively with a lab partner, follow instructions to complete a chemistry experiment, collect experimental data, formulate logical conclusions based on experimental results Introduction Much as a cook uses recipes to guide her/him in preparing […]

Glucose in Natural Products

Introduction As the world’s most common biomolecule, glucose (C6H12O6) has numerous cellular functions including serving as a metabolic fuel, as a precursor to energy storage molecules such as starch and glycogen, and as a building block molecule to important structural components such as cellulose. Glucose is a simple sugar or monosaccharide, meaning it contains a carbonyl […]

Titration of Citric Acid

Learning Goals Perform a titration and analyze the uncertainties associated with titrations; Employ a color pH indicator; Apply stoichiometry to analyze titration data; Observe an acid-base reaction. by S. Choi, R. Gleason, and K. Jewett (with edits by R. Sandwick and M. J. Simpson) Introduction Citric acid is a polyprotic acid (can release three H+s) […]

Spectrophotometric Determination of Iron

by E. L. Pool and D. Copeland (with edits by R. Sandwick and M. J. Simpson) Learning Goals Practice handling hazardous chemicals safely; Use a bunsen burner to heat a solution; Vacuum filter a solution; Practice using a transfer pipet and a mortar and pestle; Manipulate experimental conditions to illustrate the concept of limiting and […]

Chemistry of Colors

by M. J. Simpson Introduction Colored chemicals absorb and sometimes emit light in the visible portion of the electromagnetic spectrum, which is 400 – 700 nm. Absorption occurs when an electron absorbs the energy from the light, temporarily promoting the electron to a higher energy orbital. Light emission can occur when the electron relaxes back […]

Penny Statistics

adapted by M. J. Simpson and R. Sandwick from a lab originally written by by K. Jewett and S. Sontum Learning goals: analyze experimental data, formulate a logical conclusion, explain likely sources of experimental error Introduction A basic understanding of statistics is required in most scientific disciplines in order to analyze experimental data. For example, […]

Lab documentation

During the semester you will be asked to develop various aspects of your scientific record keeping and report writing. These talents will hopefully be expanded and built upon during subsequent chemistry and other science lab courses. The exact documentation requested for each laboratory exercise is explained at the end of each experimental write-up. Preparation for […]