If a solution is 10% by weight/volume and weighs 100 grams, how many grams of solute are present?

To find the amount of solute in a 10% weight/volume solution, you can use the definition of percentage by weight/volume. A 10% weight/volume solution means there are 10 grams of solute in every 100 milliliters of solution.

Since you have a solution that weighs a total of 100 grams, you can directly apply the percentage to determine the grams of solute. The formula for calculating the grams of solute is:

(Percentage) / 100 * (Total weight of solution) = Grams of solute

For this case:

10% / 100 * 100 grams = 10 grams of solute.

Thus, the calculation shows that there are 10 grams of solute present in the 100 grams of the solution. Therefore, the answer is indeed 10 grams. This understanding helps reinforce how to work with weight/volume percentages in preparing solutions, which is a vital skill for pharmacy technicians.