Final answer:
The total volume of the IV infusion after adding 6 g of a 25% solution to 250 mL of IV fluid is 274 mL.
Step-by-step explanation:
The student's question involves calculating the total volume of an IV infusion after adding a certain amount of medication to a specified amount of fluid. The medication available is a 25% solution, and the student needs to add 6 g of this solution to 250 mL of IV fluid. To find out how much stock solution is needed to get 6 g of the medication, we perform the following calculation:
Total medication present in 100 mL of stock solution = 25% of 100 mL = 0.25 × 100 g = 25 g
Volume of stock solution needed for 6 g of medication = (6 g / 25 g) × 100 mL = 24 mL
Therefore, adding 24 mL of the stock solution to the 250 mL of IV fluid gives a total volume of the IV after adding the medication as follows:
Total volume = 250 mL (IV fluid) + 24 mL (medication) = 274 mL
The correct answer to the student's question is then option C, 274 mL.