What is the percentage strength of a solution with 250 grams of drug in 1000ml?

To find the percentage strength of a solution, you can use the formula:

[

\text{Percentage Strength} = \left( \frac{\text{mass of solute (g)}}{\text{volume of solution (ml)}} \right) \times 100

]

In this case, you have 250 grams of drug dissolved in 1000 mL of solution. Plugging the values into the formula:

[

\text{Percentage Strength} = \left( \frac{250 \text{ g}}{1000 \text{ ml}} \right) \times 100

]

Calculating this gives:

[

\text{Percentage Strength} = \left( 0.25 \right) \times 100 = 25

]

Thus, the percentage strength of the solution is 25%. This means that for every 100 mL of solution, there are 25 grams of the drug present, indicating a concentrated formulation that is often used in pharmacology.

Understanding this calculation is crucial for pharmacy technicians, as it helps them prepare solutions accurately, ensuring patients receive the correct dosage and medication strength as prescribed.