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Tag: Introductory Chemistry Experiment

Bath Bombs: An Inexpensive and Accessible Kinetics Experiment

In this fun and colorful experiment, students make their own bath bombs and investigate the effect of temperature on reaction rates. by Meaghan Cabassa and Beth L. Haas* J. Chem. Educ. 2020, 97, 6, 1629–1632 Abstract: Cosmetic chemistry is a prevalent part of everyday life, but there are very few undergraduate laboratories that explore this topic.…

Determining the Pressure inside an Unopened Carbonated Beverage

Students tackle the deceptively simple task of determining the pressure of carbon dioxide gas inside a sealed soft drink can. By Hans de Grys, Journal of Chemical Education 2007, 84, 7, 1117 Abstract Soft drinks provide a unique way to explore chemical principles. A challenging exercise for students is to determine the pressure of the carbon dioxide gas inside…

Qualitative analysis of household powders

Students investigate 8 household white powders and classify them based on their physical and chemical properties. Using their findings, students then identify an unknown powder obtained from a crime scene to determine the suspect's guilt or innocence. Students gain experience in the identification of chemical and physical changes, careful organization of data, and writing chemical reactions.…

Growing Up Crystals

Adapted From Multiple Sources. Compiled Natalie Ulrich, (PhD) Many covalent and ionic compounds are solids at room temperature. Solids may exist as crystalline solids—that is, ordered arrays of atoms, ions, or molecules—or as amorphous solids, which have random or disordered arrangements of particles. There are several types of crystalline solids. In this lab, you’ll be creating…

Molar Mass Determination by Freezing Point Depression

From BeyondBenign.org and J. Chem. Ed., 82 (1), 2005, 116-119. Compiled Natalie Ulrich, (PhD) If you’ve ever made ice cream at home, you know the recipe calls for adding salt to ice to cool down the ingredients enough for the ice cream to actually freeze. What’s up with that? Or why do road crews add salt to roads in…

Synthesis of the copper pigment malachite: making tempera paint

Students synthesize the copper pigment malachite, then use the pigment to prepare egg tempera paint. Students explore "stoichiometry (excess reactants and yields), solubility, precipitation, and properties of emulsions" in this Journal of Chemical Education article by Sally D. Solomon, Susan A. Rutkowsky, Megan L. Mahon, and Erica M. Halpern. The first half of this experiment uses…
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