If you have a solution with a concentration of 15%, how many grams are in a 200ml solution?

To determine how many grams are in a 200 ml solution with a concentration of 15%, it's essential to understand how to calculate the mass of the solute from concentration. The concentration indicates that there are 15 grams of solute in every 100 ml of solution.

First, you can set up a ratio based on the concentration. For a 200 ml solution, you double the amount of solute since 200 ml is twice as much as 100 ml. Therefore, you can use the calculation as follows:

1. Identify the mass of solute in 100 ml: 15 grams.

2. For 200 ml, simply multiply the mass of solute by 2:

[

15 \text{ grams} \times 2 = 30 \text{ grams}

]

This calculation confirms that there are 30 grams of solute in a 200 ml solution with a 15% concentration. Thus, this is the correct answer.