What is the molarity of a solution containing 4 moles of KCl dissolved in 2.5 L of solution?

• A. 1.6 M
• B. 2.5 M
• C. 10 M
• D. 0.625 M

Answer: (A)

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 KCl = 4 moles, and volume of solution = 2.5 L.
3. Substitute the given values into the molarity formula: \(M = \frac{4}{2.5}\).
4. Perform the division to find the molarity (do not calculate the final value here, just set up the expression).
5. Interpret the result as the concentration of KCl in moles per liter, which is the molarity of the solution.