A bottle contains 500 mL of a solution with 2% concentration. What is the total grams of solute present?

To determine the total grams of solute in a solution, you can use the formula:

[

\text{grams of solute} = \text{volume of solution (mL)} \times \left(\frac{\text{concentration (%)}}{100}\right)

]

In this case, you have a 500 mL solution with a 2% concentration. First, convert the concentration from a percentage to a decimal by dividing by 100, which gives you 0.02. Then, multiply the volume by this decimal concentration:

[

\text{grams of solute} = 500 , \text{mL} \times 0.02 = 10 , \text{grams}

]

This calculation indicates that there are 10 grams of solute present in the solution. The answer accurately reflects the application of the concentration formula to a specific volume, making it the correct choice in the context of the problem.

This method of calculation is fundamental in pharmacy and other fields where precise measurements and concentrations are critical for ensuring the effectiveness and safety of solutions.