Final answer:
To make a 5% dextrose solution, 250 mL of 25% dextrose should be added to 1 L of 0.9% saline.
Step-by-step explanation:
To determine how many milliliters of 25% dextrose should be added to 1 L of 0.9% saline to make a 5% dextrose solution, we can use the formula for dilution: C1V1 = C2V2, where C1 and C2 are the initial and final concentrations, respectively, and V1 and V2 are the initial and final volumes, respectively.
Firstly, let's express the final volume (V2) in milliliters: 1 L = 1000 mL. Now, setting up the equation with our known values, we have:
0.25V1 = 0.05(1000 + V1)
After rearranging the equation and solving for V1, we find:
V1 = (0.05 × 1000) / (0.25 - 0.05)
V1 = 250 mL
So, 250 mL of 25% dextrose needs to be added to 1 L of 0.9% saline to achieve the desired 5% dextrose solution.