A solution is prepared by dissolving 0.50 mol of NaCl in enough water to make 2.0 L of solution. What is the molarity of the NaCl solution?

• A. 1.0 M
• B. 0.50 M
• C. 0.25 M
• D. 2.0 M

Answer: (C)

Verified step by step guidance

1. Identify the formula for molarity, which is the number of moles of solute divided by the volume of solution in liters: \(M = \frac{\text{moles of solute}}{\text{volume of solution in liters}}\).
2. Note the given values: moles of NaCl = 0.50 mol, and volume of solution = 2.0 L.
3. Substitute the given values into the molarity formula: \(M = \frac{0.50\ \text{mol}}{2.0\ \text{L}}\).
4. Perform the division to find the molarity (do not calculate the final number here, just set up the expression).
5. Interpret the result as the concentration of NaCl in the solution, expressed in moles per liter (M).