A FeCl₃ solution is 0.175 mol L^-1. How many mL of a 0.175 mol L^-1 FeCl₃solution are needed to make 450. mL of a solution that is 0.300 mol L^-1 in Cl^- ion?

Question

Quizplus · Accepted Answer

To find the volume of the FeCl₃ solution needed, use the dilution equation C₁V₁ = C₂V₂. FeCl₃ dissociates into 3 Cl⁻ ions, so the initial concentration of Cl⁻ is 3 × 0.175 mol L⁻¹ = 0.525 mol L⁻¹. The final concentration of Cl⁻ is 0.300 mol L⁻¹. Solving 0.525V₁ = 0.300 × 450 gives V₁ = 257 mL.

A FeCl3 Solution Is 0

A FeCl₃ Solution Is 0