If a solution has 25 grams of dextrose in 500ml, what is the percentage strength of the solution?

To determine the percentage strength of a solution, you can use the formula for calculating percentage concentration, which is:

Percentage (%) = (Amount of solute in grams / Total volume of solution in milliliters) × 100

In this scenario, the amount of dextrose (the solute) is 25 grams and the total volume of the solution is 500 ml.

Plugging in the values:

Percentage (%) = (25 grams / 500 ml) × 100

Calculating this gives:

Percentage (%) = (0.05) × 100 = 5%

This means that 5% of the solution consists of dextrose, which is why this answer is the correct choice. The solution's strength reflects how much solute is present relative to the total volume, indicating a clear understanding of concentration in pharmacy practice.