A saturated solution of CaF₂ has [Ca²⁺] = 2.1×10⁻⁴ M.
What is Ksp of CaF₂?
- A
8.8×10⁻⁸
- B
4.4×10⁻⁸
- Ccheck_circle
3.7×10⁻¹¹
- D
1.8×10⁻¹²
Explanation
Ksp = [Ca²⁺][F⁻]² = (2.1×10⁻⁴)(4.2×10⁻⁴)² = (2.1×10⁻⁴)(1.764×10⁻⁷) = 3.70×10⁻¹¹.
Introduction to Solubility Equilibria
AP Chemistry· difficulty 3/5
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