Questions: If 0.167 moles of NaCl are dissolved in a 250.0 mL solution, what is the concentration of the NaCl solution?

Solution Steps

We are given the number of moles of NaCl and the volume of the solution:

• \( n = 0.167 \, \text{moles} \)
• \( V = 250.0 \, \text{mL} \)

To calculate the molarity, we need to convert the volume from milliliters to liters: \[ V = \frac{250.0 \, \text{mL}}{1000} = 0.2500 \, \text{L} \]

The molarity \( C \) of the solution is calculated using the formula: \[ C = \frac{n}{V} \] Substituting the values: \[ C = \frac{0.167 \, \text{moles}}{0.2500 \, \text{L}} = 0.668 \, \text{mol/L} \]

Final Answer