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Che2A - Prelab Safety questions and Answers
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Che2A - Prelab Safety questions and Answers Approved chemical splash (safety) goggles must be worn at all times. Chemical splash goggles will be worn by EVERY student while in the laboratory. These safety goggles should not be modified in any manner. At NO time are safety glasses of any kind acce...

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  • November 11, 2024
  • 3
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • che2a prelab safety questions and answers
  • approved chemical splash safety goggles must be
  • arms and legs should be covered at all times as w

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Che2A - Prelab Safety questions and
Answers
Approved chemical splash (safety) goggles must be worn at all times. - answer
Chemical splash goggles will be worn by EVERY student while in the laboratory. These
safety goggles should not be modified in any manner. At NO time are safety glasses of
any kind acceptable in the laboratory.

Arms and legs should be covered at all times. - answer As well as covering your
arms and legs, you must wear a 100% cotton Laboratory Coat.

Only authorized and supervised experiments are allowed. - answer Perform only
authorized experiments.

All lab work must be performed in an authorized lab room only.

All lab work must be supervised by a TA or an instructor.

Do not remove chemicals from the lab room.

Maintaining your work area - answer acid spill - neutralized with solid sodium
bicarbonate, sweep the residue into the trashcan, and wipe out the affected area by
water.

Safety Tips - answer It is important in a laboratory setting to establish safe working
habits. This involves planning ahead, thinking about the consequences of your actions,
functioning with an awareness of your surroundings, and learning the safe way to
handle each chemical you use.

Diluting concentrated acids - answer Acids are a common laboratory reagent.
Chemical supply houses deliver concentrated stock solutions that must be diluted.
Because the density of concentrated acid is much greater than water, the concentrated
acid must ALWAYS be poured into the water and NOT the converse.

Acid dissolution is an exothermic reaction (releases heat). By adding a small amount of
acid to a larger amount of water, the heat is allowed to dissipate without causing boiling
and spattering. The high heat capacity of water helps the dissipation.

Lastly, keep in mind this student should be wearing a lab coat. For safety reason, it is
required for students to always wear a lab coat while in lab.

Heating liquids and wet solids - answer When heating water to boiling care should be
taken to prevent "bumping." Bumping occurs when a pocket of water near the bottom of

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