Question

A 1.00 L of a solution is prepared by dissolving 125.6 g of NaF in it. What would be the molarity of this solution?

Answer 1

Answer:

2.99 M

Explanation:

In order to solve this problem we need to keep in mind the definition of molarity:

• Molarity = moles of solute / liters of solution

In order to calculate the moles of solute, we convert 125.6 g of NaF into moles using its molar mass:

• 125.6 g NaF ÷ 42 g/mol = 2.99 mol NaF

As the volume is already given, we can proceed to calculate the molarity:

• Molarity = 2.99 mol / 1.00 L = 2.99 M