What is the final concentration in mg/mL after diluting 25 mg to a final volume of 50 mL?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

What is the final concentration in mg/mL after diluting 25 mg to a final volume of 50 mL?

Explanation:
Understanding this asks you to find how concentrated the solution is after dilution. The final concentration equals the amount of drug divided by the final volume. Here, you have 25 mg in a total volume of 50 mL. So the concentration is 25 mg ÷ 50 mL = 0.5 mg/mL. Therefore, the final concentration is 0.5 mg/mL. Quick sanity checks: 0.25 mg/mL would need 25 mg in 100 mL; 1 mg/mL would need 25 mg in 25 mL; 2 mg/mL would need 25 mg in 12.5 mL.

Understanding this asks you to find how concentrated the solution is after dilution. The final concentration equals the amount of drug divided by the final volume. Here, you have 25 mg in a total volume of 50 mL. So the concentration is 25 mg ÷ 50 mL = 0.5 mg/mL.

Therefore, the final concentration is 0.5 mg/mL. Quick sanity checks: 0.25 mg/mL would need 25 mg in 100 mL; 1 mg/mL would need 25 mg in 25 mL; 2 mg/mL would need 25 mg in 12.5 mL.

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