1.) If a formula for preparing 120 mL of a extemporaneous suspension requires 6 30 mg...
1.) If a formula for preparing 120 mL of a extemporaneous suspension requires 6 30 mg tablets. How many mg are needed to prepare 30 mL
2.) An otic solution contains 0.2% benzocaine. How many grams of benzocaine would be needed to create 50 15 mL dropper bottles?
Homework Answers
1)
total mass of tables = 6 x 30 = 180 mg
120 mL ----------------> 180 mg
30 mL ----------------> ??
mass = 180 x 30 / 120
= 45 mg
mass needed = 45 mg
2)
total volume = 50 x 15 = 750 mL
m/V% = mass of solute x 100 / volume
0.2 = mass x 100 / 750
mass = 1.5 g
benzocaine needed = 1.5 g
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