If a solution contains 5% sodium chloride, how many grams of sodium chloride are in 200 mL?

To determine how many grams of sodium chloride are present in a 200 mL solution with a concentration of 5%, it is important to understand what a 5% solution means. A 5% solution indicates that there are 5 grams of sodium chloride in every 100 mL of solution.

To find out how many grams of sodium chloride are in 200 mL, we can set up a proportion. Since 200 mL is double the volume of 100 mL, we can simply double the amount of sodium chloride contained in 100 mL. Therefore, in 200 mL, there are:

5 grams per 100 mL × 2 = 10 grams.

This logical calculation confirms that the correct answer, indicating the presence of 10 grams of sodium chloride in 200 mL of a 5% solution, is accurate. Understanding this concentration and its relationship with volume is crucial in medical math, as it frequently applies to dosage and preparation of solutions in healthcare settings.