What is the concentration of FeCl₃ in a solution prepared by dissolving 20.0 g of FeCl₃ in enough water to make 275 mL of solution?

Question

Quizplus · Accepted Answer

First, we need to calculate the number of moles of FeCl3 in 20.0 g of FeCl3.

Molar mass of FeCl3 = 162.2 g/mol
Number of moles of FeCl3 = mass/molar mass = 20.0 g/162.2 g/mol = 0.123 mol

Next, we need to calculate the concentration of FeCl3 in the solution.

Concentration = number of moles/volume of solution in liters
Volume of solution = 275 mL = 0.275 L

Concentration = 0.123 mol/0.275 L = 0.448 M

Therefore, the concentration of FeCl3 in the solution is 0.448 M, which is option B.

What Is the Concentration of FeCl3 in a Solution Prepared