Question

Which is the CORRECT representation for the solubility product (K_sp) of CaF₂?

Options

• [Ca²⁺] [F⁻]

• [Ca²⁺] [F⁻]²

• [2Ca²⁺] [F⁻]²

• [Ca²⁺] [2F⁻]²

Answer 1

[Ca²⁺] [F⁻]²

Explanation:

The solubility equilibrium for CaF₂ is

\[\ce{CaF_{2(s)} ⇌ Ca^2+_{( aq)} + 2F^-_{( aq)}}\]

∴ K_sp = [Ca²⁺] [F⁻]²