Session S61b (Wednesday, 2pm, Thomas 216)

P799: Preparation of malachite and tempera paint in the general chemistry laboratory

Sally Solomon (Drexel University, USA)

In an experiment intended for mainstream general chemistry, copper-based pigments are prepared then combined with egg yolk binder to make tempera paint.  The synthesis of malachite is done at room temperature, uses nonhazardous household materials, has a yield of 95% and produces nontoxic products, thus making it ideal for a laboratory course emphasizing green chemistry. Problems with safety and waste disposal are significantly reduced. In performing this experiment, students are introduced to artists’ paints while they apply fundamental ideas involved in topics such as stoichiometry, solubility, precipitation and properties of emulsions.

Other experiments involving principles of green chemistry will be described including a study of the effectiveness of nonionic cleaners using standard dirt compositions.

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