Understanding Molarity

Molarity (M) is a unit of concentration that represents moles of solute per liter of solution.

The Calculation

1. Identify the given information:

* Volume of solution (V) = 1.20 L

* Molarity of solution (M) = 0.400 M

2. Use the formula:

Moles of solute (n) = Molarity (M) × Volume of solution (V)

3. Plug in the values and solve:

n = 0.400 M × 1.20 L = 0.480 moles

Answer: There are 0.480 moles of KCl dissolved in the solution.