12 never look down the opening of any container

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Unformatted text preview: the flame and allow the contents to cool for a minute or so. (12) NEVER look down the opening of ANY container, including beakers, flasks, and test tubes (as well as any other piece of equipment). Should something happen to cause the chemicals to "blast out" of the container, they will go directly into your face if you are looking down the opening at the time. (13) Do not use graduated cylinders for any purpose other than to measure a volume of as liquid. Graduated cylinders should vat he used to get reagent for an experiment (use a beaker for this) or to run reactions (use a test tube for this). (14) Never put a dropper into a reagent bottle. Instead, put the reagent in a beaker so you can bring it back to your desk and use a dropper there. I hope you see that these guidelines are for YOUR benefit, and follow them faithfully; they will become habit more quickly than you can imagine. Most importantly, if you have ANY questions Dakota State University Page 14 of 232 Safety Guidelines General Chemistry I and II Lab Manual or comments, please tell me as quickly as possible. I will be more than happy to clarify any questions you may have. Dakota State University Page 15 of 232 Safety Guidelines General Chemistry I and II Lab Manual Chemistry Laboratory Name and Section Number: Date: Name: I, the undersigned student, have received safety training, understood it and agree to abide by the safety guidelines. I understand the importance of proper eye protection in the laboratory at all times. I have been warned about the dangers of wearing contact lenses in the laboratory and understand that I should not wear contacts in the laboratory. I also understand that if I do wear contacts in the lab or fail to abide by the safety rules, I am doing so at my own risk and will not hold Dakota State University or Dr. Richard Bleil liable for any injuries that result. Signature of Student:DO NOT SIGN-FOR YOUR RECORDS Dakota State University Date: Page 16 of 232 Using the Pasco System General Chemistry I and II Lab Manual Using the Pasco System Your first question ought to be “What is Pasco and why do I need it?” To answer that question, we need to discuss analog and digital devices (starting with the latter). Your computer is a digital device, which means it only can think in terms of “Ones” and “zeros”, or, if you prefer, “on” or “off”. For example, take your plain old-fashioned light switch: it only bas two settings, it is on, or it is off. Analog devices, on the other hand, can take any valve we set. When I was in high school, my best friend was (and still is) Mitch. Now, Mitch’s parents had a cleaning woman stop by once a week, who had a child of her own. She would often bring her child with her as she came to clean their house. The child took great delight in going into Mitch’s room and turning the volume of his stereo all the way up. When Mitch would turn the stereo on, then, it blasted like you cannot believe. Now, if the stereo was digital, he...
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