![]() ![]() neutralize spilled acids or sodium hydroxide solutions with NaHCO3, container above each sink. do not leave spilled chemicals on countertops or on the floor. in case of accidental chemical spill or vapor release, notify instructor and prepare to leave laboratory, if necessary. (there are emergency showers located inside the stockroom.) check w/ instructor for appropriate follow-up treatment. if any chemicals come in contact with your body or clothes, rinse off immediately w/ large amounts of water. For example do not put finger or thumb over mouth of a test tube even when shaking. avoid contact of chemicals w/ your skin, as many toxic chemicals can be absorbed through skin. if you notice a fellow student trying and you at a greater distance have no trouble detecting it, tell the student.) 6. (some people can't detect odor of sulfur dioxide, don't keep trying to detect odor of this gas. do not breathe deeply when checking odor. gradually move container closer to your nose. ![]() when determining the odor of gas, hold container far away and gently wave some of gas towards your nose w/ other hand. if you are not sure whether undesirable fumes will be produced, ask instructor. always work under exhaust hoods at rear of laboratory when directed to do so in an experiment. do not eat any ice that is being used in the laboratory. do not drink water from any of the faucets in the laboratory or from your wash bottles. always wash your hands w/ water at end of laboratory period to remove any water soluble chemicals that you may have inadvertently contacted w/ your hands. do not look directly at burning magnesium or at any electrical arc.ġ. heat top of the solution not bottom of test tube to avoid rapid expulsion of hot liquid out of the top of the tube. aim the tube along the center of the counter top. when heating a substance in a test tube, always direct the mouth of the tube away from yourself and nearby people. always keep your face at a distance from any glass container which is being heated or in which a reaction is occurring. (most chemical laboratories will not allow workers to wear contact lenses because of this hazard and b/c they can absorb fumes.) know the location of the three eyewashes, but also remember that your sink may be the fastest way to begin rinsing. if you are wearing contact lenses remove them as quickly as possible so that no chemical will remain trapped between the lenses and your eyes. if any chemicals get in your eyes, immediately rinse your eyes with water and continue to rinse for at least 15 minutes. you may not wear tinted safety glasses in the lab. normal prescription glasses are not satisfactory. safety glasses must meet ANSI Z87.1 specifications. safety glass should provide protection from the sides as well as the front. this is required by california federal laws. safety glasses must be worn at all times when any experiments are being done. before you leave laboratory, always clean your work area, lock your drawer, and make certain water and gas are shut off.ġ. never leave your experiment unattended when there is a hazard such as a lit burner. report any accident, no matter how minor, to the instructor. if someone needs to talk to you, you should go outside and talk to them there. visitors and children are not allowed in laboratory. An unauthorized experiment at Bakersfield College in early 1960s resulted in an explosion that caused extensive damage to a student's eye. if you are curious and wish to do an experiment which is not assigned, you must get permission from the instructor. no unauthorized experiments or unsupervised laboratory work is permitted. avoid wearing expensive clothing in lab as there are many possibilities for damage. do not provide sufficient protection in event of an accident. shoes and appropriate clothing must be worn in laboratory. no eating, drinking, smoking is permitted in laboratory or anywhere inside chem building.
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