safety-in-academic-chemistry-laboratories-students

Thus if you plan to add acetic acid to chromic oxide

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Unformatted text preview: he basis for practical decisions involving the handling of chemicals. Thus, if you plan to add acetic acid to chromic oxide, nitric acid, perchloric acid, potassium permanganate, or some other oxidizing agent as part of an experimental procedure, you can learn from the MSDSs for the acetic acid and other chemicals you plan to use that the reaction will be vigorous; if the quantities are not minimized, the vigor of the reaction could be disastrous. You could discover that you shouldn’t mix a waste containing acetic acid with a waste containing nitric acid. If you had to bring together acetic acid and any one or more of its incompatible compounds, you now know that it would be important to carefully control experimental conditions. With respect to safe storage, you learn from the reactivity section that acetic acid should not be stored near chromic oxide, nitric acid, perchloric acid, potassium permanganate, or any other oxidizing agent. Another example: differing solubilities in water. Which chemicals are soluble in water? All nitrates, but only some chlorides and sulfides. Some of the insoluble chlorides are slightly soluble in warm water, others are not. The solubility of some sulfides varies depending on the pH. Knowledge of differing solubilities in water and other solvents is useful to analytical chemists. Some salts are neutral, others are acidic or basic. Look for these details and others in the MSDSs for the chemicals you use. The properties of chemicals are unique and differ for many reasons. Remembering these reasons is useful to serious students of chemistry. Classifying Hazardous Chemicals There are millions of individual chemicals, and each has its own hazardous character20 students short index 1/15/03 12:45 PM Page 21 istics. If you intend to prevent accidents when working with chemicals in the laboratory, then you need to know the hazardous characteristics of the chemicals with which you will work. As a student, you will work with several dozen or more chemicals. How can you be expected to...
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This document was uploaded on 02/27/2014 for the course PHYS 1B at UCSD.

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