What is the approximate percentage concentration of 50 grams of solute in 2 liters of solution?

To determine the percentage concentration of a solution, you can use the formula:

[

\text{Percentage concentration} = \left( \frac{\text{mass of solute (grams)}}{\text{volume of solution (milliliters)}} \right) \times 100

]

In this case, you have 50 grams of solute and 2 liters of solution. First, convert liters to milliliters, knowing that 1 liter is equal to 1000 milliliters. Therefore, 2 liters is 2000 milliliters.

Now, plug the values into the formula:

[

\text{Percentage concentration} = \left( \frac{50 \text{ g}}{2000 \text{ mL}} \right) \times 100

]

Calculating this gives:

[

\text{Percentage concentration} = \left( 0.025 \right) \times 100 = 2.5%

]

Thus, the approximate percentage concentration of the solution is 2.5%. This aligns perfectly with the chosen answer, which reflects a solid understanding of how to calculate percentage concentration in solutions.