A nurse is preparing to administer potassium chloride elixir 20 mEq/day PO to divide equally every 12 hr. Available is 6.7 mEq/5 mL. How many mL should the nurse administer per dose?

The correct answer is A: 7.5 mL. To calculate this, first determine the total daily dose (20 mEq/day divided into 2 doses = 10 mEq per dose). Next, calculate the mL per dose using the concentration provided (6.7 mEq/5 mL). Divide the dose needed (10 mEq) by the concentration (6.7 mEq) to get the mL per dose (10/6.7 Ôëê 1.49 mL). Since the dose must be practical to administer, round up to the nearest feasible volume, which is 7.5 mL. Other choices are incorrect due to incorrect calculations or rounding errors.