JEE Main Chemistry question
In the system, CaF₂(s) ⇌ Ca²⁺(aq) + 2F⁻(aq), increasing the concentration of Ca²⁺ ions 4 times will cause the equilibrium concentration of F⁻ to change to:
Answer: (B)
Solution
Ksp=[Ca²⁺][F⁻]² constant; 4×[F⁻]²_new=[F⁻]²_old → [F⁻=[F⁻/2.