What is the concentration of FeBr₃ in a solution prepared by dissolving 10.0 g of FeBr₃ in enough water to make 275 mL of solution? A)1.23 × 10^-4 M B)0.123 M C)1.23 M D)1.23 × 10³ M

Question

Quizplus · Accepted Answer

To find the concentration in moles per liter (M), first calculate the molar mass of FeBr3. Using the atomic masses (Fe = 55.85, Br = 79.904), the molar mass of FeBr3 = 55.85 + 3(79.904) = 295.562 g/mol. Then, convert the mass of FeBr3 into moles: 10.0 g / 295.562 g/mol = 0.0338 moles. Finally, divide by the volume in liters (275 mL = 0.275 L) to get the concentration: 0.0338 moles / 0.275 L = 0.123 M.

What Is the Concentration of FeBr3 in a Solution Prepared

What Is the Concentration of FeBr₃ in a Solution Prepared