Question

The veterinarian orders a patient to receive a 700ml of lactated ringers ssolution with 2.5% dextrose. How many mls of 50% dextrose must be added to make 2.5% dextrose solution?

Answer 1

To make a 2.5% dextrose solution, 17.5 g of 50% dextrose solution needs to be added to a total of 700 mL of lactated ringers solution.

Step-by-step explanation:

To determine the amount of 50% dextrose solution needed to make a 2.5% dextrose solution, we can use the concept of mass/mass percent concentration. This involves calculating the mass of dextrose in the final solution, as a percentage of the total mass of the solution.

Let's assume we need to make a total of 700 mL of the 2.5% dextrose solution. To calculate the mass of dextrose needed, we can use the formula:

Mass of dextrose in final solution = Mass percent dextrose × Total mass of solution

Since we want a 2.5% dextrose solution, the mass percent dextrose is 2.5%. The total mass of the solution is 700 mL (which is equivalent to 700 g, assuming the density of the solution is 1 g/mL).

Substituting the values into the formula:

Mass of dextrose in final solution = 2.5% × 700 g = 0.025 × 700 g = 17.5 g

Therefore, 17.5 g of the 50% dextrose solution must be added to make the 2.5% dextrose solution.