A solution contains 50 g of drug in 700 mL. What is the percentage strength of this solution?

To calculate 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 scenario, you have 50 grams of the drug (solute) dissolved in 700 mL of solution.

1. First, identify the mass of the drug, which is 50 g.

2. Identify the volume of the solution, which is 700 mL.

3. Plug these values into the formula:

[

\text{Percentage Strength} = \left( \frac{50 , \text{g}}{700 , \text{mL}} \right) \times 100

]

4. Performing the calculation gives:

[

\text{Percentage Strength} = \left( 0.0714 \right) \times 100 \approx 7.14%

]

This rounds to approximately 7%, making the correct answer the percentage strength of the solution.

This highlights how essential it is to correctly apply the formula and ensure correct conversions and calculations in determining the strength of a