Your company is hiring a new lab technician. You are interviewing 4 candidates and ask
them to measure as precisely and accurately as possible 50 mL of THF solvent
(density=887.6 g/L) and compute
the corresponding mass. They report the corresponding mass of solvent obtained.
Which candidate(s) will you
recommend to your manager based on their performance on this experiment? Select
all that apply.
Hint: The pipet has a precision of 0.05 mL
Instruments:
A) Candidate 1 used a graduated cylinder (Figure above). He reported the volume
V=50.0 mL. He computed a
mass of 0.44 g
B) Candidate 2 used a beaker (Figure above). He reported the volume V=50.0 mL.
He computed a mass of solvent
of 44.38 g
C) Candidate 3 used a volumetric pipet (figure above). He reported a volume V=50.
ml. He computed a mass of
solvent of 44 g.
D)
Candidate 4 used a volumetric pipet (figure above). He reported a volume V=50.00
ml. He computed a mass
of solvent of 44.38 g.