Pharmaceutics Calculations Practice Set #3 with Answers


Question 1
If 10 g of sucrose is dissolved in enough water to make 200ml solution. What is the % w/v concentration of the solution?
A. 10
B. 20
C. 5
D. 15

Question 2
How many grams of phenol should be used to prepare 240 g of a 5% w/w solution?
A. 5
B. 12
C. 24
D. 15

Question 3
How many grams of potassium permanganate should be used in compounding the following prescription?
Potassium Permanganate 0.02%
Distilled Water ad 250.0
Sig. As directed
A. 0.02
B. 0.5
C. 0.05
D. 5

Question 4
Peppermint spirit contains 10% v/v of peppermint oil. What volume of the spirit will contain 75 mL of peppermint oil?
A. 0.1L
B. 1L
C. 750ml
D. 75ml

Question 5
If 3g of glacial acetic acid is added to 97ml of water to make a dilute solution for irrigation, what is the percentage strength (w/w) of the solution?
A. 10
B. 4.76
C. 3
D. 5

Question 6
Ibuprofen tablets are permitted to contain not less than 90% and not more than 110% of the labeled amount of ibuprofen, what would be the permissible range in content of the drug, expressed in milligrams, for ibuprofen tablets labeled 200 mg each and weighing 800 mg?
A. 90 – 110 mg
B. 720 – 880 mg
C. 180 – 220 mg
D. 200 – 800 mg
E. It does not matter as long as it get’s rid of headache!

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