Pharmacy Technician Certification Exam Practice Questions Practice Question
What volume,in mL of a 10% potassium chloride solution supplying 20 mEq/15 mL is needed to provide one 15 mEq dose of KCl?
Correct Answer: B
Rationale: To determine the volume of the 10% potassium chloride solution needed for a 15 mEq dose, we start by noting that the solution provides 20 mEq in 15 mL. This means that each mL contains approximately 1.33 mEq (20 mEq / 15 mL). To find the volume needed for 15 mEq, we can set up the equation:
Volume (mL) = Desired mEq / mEq per mL = 15 mEq / 1.33 mEq/mL ≈ 11.25 mL.
Option A (8 mL) is insufficient to provide 15 mEq. Option C (15 mL) provides more than needed, delivering 20 mEq. Option D (20 mL) also exceeds the requirement, supplying 26.67 mEq. Thus, 11.25 mL is the precise volume required for the dose.
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