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Salinity is commonly measured using which unit?
a. CFU
b. NTU
c. mEq/L
d. ppt - ✔✔d. ppt
How would you prepare 100 mL of 0.0400 M KCI from 0.200 M KCI stock solution?
a. Withdraw 10.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric
flask and add water until the final volume is 100 mL.
b. Withdraw 20.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric
flask and add water until the final volume is 100 mL.
c. Withdraw 40.0 mL of 0.200 M KC, place it in a partially filled 100 mL volumetric flask
and add water until the final volume is 100 mL.
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, d. Withdraw 50.0 mL of 0.200 M KCl, place it in a partially filled 100 mL volumetric
flask and add water until the final volume is 100 mL. - ✔✔b. Withdraw 20.0 mL of 0.200
M KCI, place it in a partially filled 100 mL volumetric flask and add water until the final
volume is 100 mL.
Which of the following is not considered Laboratory Personal Protective Equipment
(PPE)?
a. Safety Glasses
b. Hair Tie
c. Face Shield
d. Lab Coat - ✔✔b. Hair Tie
Which of the following is a concern after a chemical spill?
a. Environmental release
b. Adequate engineering controls or PPE to protect staff during cleanup
c. Slip or Trip Hazard
d. All of the above - ✔✔d. All of the above
Where should flammable liquids be stored?
a. In a fume hood
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