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The problem you're working on asks for the concentration of a solution in % w/v (weight/volume), where 2.3 grams of NaCl is dissolved in enough water to make 125 mL of solution. 

The formula for % w/v concentration is:

\[
\text{% w/v} = \left( \frac{\text{mass of solute}}{\text{volume of solution}} \right) \times 100
\]

Here:
- Mass of solute (NaCl) = 2.3 grams
- Volume of solution = 125 mL

Now, applying these values to the formula:

\[
\text{% w/v} = \left( \frac{2.3}{125} \right) \times 100
\]

Let me calculate that for you.The concentration of the solution is approximately **1.84% w/v**.

Would you like further details or have any questions? Here are some related questions to deepen understanding:

1. What does % w/v mean in terms of a solution's concentration?
2. How would the concentration change if the volume of the solution increased while keeping the mass of NaCl constant?
3. Can this formula be used for any solute, and why?
4. How does % w/v differ from % w/w or % v/v concentration calculations?
5. What would the concentration be if 5 grams of NaCl were dissolved in 250 mL of water?

**Tip:** Always ensure units are consistent (e.g., grams for mass and milliliters for volume) when using the % w/v formula to avoid errors in concentration calculation.

What is the concentration of a solution in % w/v made by dissolving 2.3 grams NaCl in enough water to have 125 mL of solution?

Find the % w/v concentration of a solution by dissolving 2.3 grams of NaCl in 125 mL of water. Learn to use the % w/v formula to solve this problem, suitable for students in Grades 8-10.

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