CHM151 lab Exam 1 Questions With Correct Answers

CHM151 lab Exam 1 Questions With Correct
Answers


Qualitative - CORRECT ANSWER✔✔-noting observations such as color,
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color changes, hardness, whether heat is liberated or absorbed, and
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odor.


Quantitative - CORRECT ANSWER✔✔-noting the amount of a
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measurable change in mass, volume, or temperature, for example, fro
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which the qualitative data are already known.
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Four objectives in the laboratory - CORRECT ANSWER✔✔-1. To develop
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the skills necessary to obtain and evaluate a reliable original result.
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2. To record your results for future use.
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3. To be able to draw conclusions regarding you results (with the aid of
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some coaching and reading in the beginning.)
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4. To learn to communicate your results critically and knowledgeably.
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Safety Rule 1 - CORRECT ANSWER✔✔-Wear approved eye protection
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(including splash guards) at all times while in the laboratory.
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-must include shatterproof lenses and side shields.
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,-use fountain before the material runs behind your eyeglasses and into
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your eyes. There is a "panic bar" for easy activation.
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Safety rule 2 - CORRECT ANSWER✔✔-Wear shoes at all times
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Safety rule 3 - CORRECT ANSWER✔✔-Eating, drinking, and smoking are
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strictly prohibited in the laboratory at all times.
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Safety rule 4 - CORRECT ANSWER✔✔-Know where to find and how to
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use all safety and first-aid equipment.
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Safety Rule 5 - CORRECT ANSWER✔✔-Consider all chemicals to be
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hazardous unless you are instructed otherwise. Dispose of chemicals as
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directed by your instructor.
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Safety rule 6 - CORRECT ANSWER✔✔-If chemicals come into contact
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with your skin or eyes, wash immediately with copious amounts of
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water and then consult your laboratory instructor
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Safety rule 7 - CORRECT ANSWER✔✔-Never taste anything. Never
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directly smell the source of any vapor or gas.
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, Safety rule 8 - CORRECT ANSWER✔✔-Perform in the fume exhaust hood
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any reactions involving skin-irritating or dangerous chemicals, or
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unpleasant odors. |




Exhaust hoods - CORRECT ANSWER✔✔--have fans to exhaust fumes out
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of the hood and away from the user.
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-used when studying noxious, hazardous and flammable materials.
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-shatterproof glass window used as a shield to protect you from minor
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explosions
-toxic fumes are stored in the hood.
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safety rule 9 - CORRECT ANSWER✔✔-never point a test tube that you
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are heating at yourself or your neighbor. It may erupt like a geyser.
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safety rule 10 - CORRECT ANSWER✔✔-Do not perform any
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unauthorized experiments. |




safety rule 11 - CORRECT ANSWER✔✔-clean up all broken glassware
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immediately


safety rule 12 - CORRECT ANSWER✔✔-always pour acids into water, not
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water into acid, becuase the heat of solution will cause the water to boil
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and the acid to spatter. "Do as you oughter, pour acid into water"
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