which of the following is the quantity of diluent a pharmacy technician should combine with a 5-ml vial containing 500 mg of azithromycin to achieve a final concentration of 2 mg/ml?

120 ml
495 ml
995 ml
245 ml

Question

which of the following is the quantity of diluent a pharmacy technician should combine with a 5-ml vial containing 500 mg of azithromycin to achieve a final concentration of 2 mg/ml?

120 ml
495 ml
995 ml
245 ml

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Pharmacy Calculations" ], "new_concepts": [], "current_concepts": [ "Pharmacy Calculations", "Dosage Calculations" ] } ## Calculate the total volume of the final solution Using the *Pharmacy Calculations* knowledge point $$ \begin{aligned} &\text{Total Mass of Active Ingredient} = 500\text{ mg}\ &\text{Desired Final Concentration} = 2\text{ mg/mL}\ &\text{Total Final Volume} = \frac{500\text{ mg}}{2\text{ mg/mL}} = 250\text{ mL} \end{aligned} $$ ## Determine the required volume of diluent Using the *Pharmacy Calculations* knowledge point $$ \begin{aligned} &\text{Vial Volume} = 5\text{ mL}\ &\text{Diluent Volume} = \text{Total Final Volume} - \text{Vial Volume}\ &\text{Diluent Volume} = 250\text{ mL} - 5\text{ mL} = 245\text{ mL} \end{aligned} $$

(A) 120 mL

(B) 495 mL

(C) 995 mL

(D) 245 mL

{ "subject": "Natural Science", "question_type": "Multiple Choice", "knowledge_point": [ "Natural Science", "Pharmacy Calculations", "Dosage Calculations" ] }

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Question

Explanation:

Calculate the total volume of the final solution

Determine the required volume of diluent

Answer: