Concentration Calculations
Pharmacy Technician Certification Exam Ptce · Flashcards · Application
PHARMACY TECHNICIAN CERTIFICATION EXAM PTCE · FLASHCARDS
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QUESTION
Calculate
V
1
V_1
V
1
: prepare
100
mL
100\ \text{mL}
100
mL
of
2
mg/mL
2\ \text{mg/mL}
2
mg/mL
from
10
mg/mL
10\ \text{mg/mL}
10
mg/mL
stock.
QUESTION
What is the concentration in mg/mL after reconstituting
1
g
1\ \text{g}
1
g
to a final volume of
20
mL
20\ \text{mL}
20
mL
?
QUESTION
Identify the percent strength (%
w
/
v
w/v
w
/
v
) of a solution labeled
5
mg/mL
5\ \text{mg/mL}
5
mg/mL
.
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ANSWER
0.5
%
w
/
v
0.5\%\ w/v
0.5%
w
/
v
. 5 mg/mL equals 0.5 g per 100 mL, corresponding to 0.5% w/v.
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