The precipitate of (CaF₂) with (Kₛₚ = 1.7 × 10⁻¹⁰) is obtained when equal volumes of the following are mixed:
a) 0.1 M (Ca²⁺) and 0.1 M (F⁻)
b) 0.01 M (Ca²⁺) and 0.01 M (F⁻)
c) 0.001 M (Ca²⁺) and 0.001 M (F⁻)
d) 0.5 M (Ca²⁺) and 0.5 M (F⁻)