What is the molarity of a solution prepared by dissolving 0.150 moles of KOH in 400.0 mL of solution?

• A. 2.67 M
• B. 0.0600 M
• C. 0.375 M
• D. 0.600 M

Answer: (C)

Verified step by step guidance

1. Identify the formula for molarity, which is defined as the number of moles of solute divided by the volume of the solution in liters: \(M = \frac{\text{moles of solute}}{\text{volume of solution in liters}}\).
2. Note the given values: moles of KOH = 0.150 moles, and volume of solution = 400.0 mL.
3. Convert the volume from milliliters to liters by dividing by 1000: \$400.0\ \text{mL} = \frac{400.0}{1000} = 0.400\ \text{L}$.
4. Substitute the values into the molarity formula: \(M = \frac{0.150}{0.400}\).
5. Calculate the division to find the molarity, which will give the concentration of the KOH solution in moles per liter (M).