A solution is labelled 5% w/v. How much drug is present in 60 mL of the solution?
Correct answer: B. 3 g
- A. 0.3 g
- B. 3 g
- C. 30 g
- D. 300 g
Explanation
A 5% w/v solution contains 5 g in every 100 mL. Therefore, 5 g × 60 ÷ 100 = 3 g in 60 mL. The percentage refers to grams per 100 mL, not grams per 1 mL.
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About Drug Calculations and Dosage
Drug calculations apply measurement systems, unit conversions, dosage formulas, tablet and liquid doses, percentage and ratio strength, and weight based dosing. Work also includes calculating IV flow rates, infusion times and doses for children, while distinguishing the prescribed dose from the available concentration.
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