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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