Question

15g of FeCI3 is dissolved in 450 mL of solution. What is the concentration of [CI-]?

Answer 1

The concentration of [CI-] : 0.617 M

Further explanation

FeCl₃ dissolved in 450 mL of solution(will dissociate )

Reaction

FeCl₃⇒Fe³⁺+3Cl⁻

• mol FeCl₃(MW=162,2 g/mol)

$\tt \dfrac{15}{162.2}=0.0925$

• mol Cl⁻ :

$\tt \dfrac{3}{1}\times 0.0925=0.2775$

• molarity of Cl⁻ :

$\tt \dfrac{0.2775}{0.45}=0.617~M$