Question

The solubility of BaSO₄ is 1.1 × 10^-5 mol/L. What is its K_sp?

• A. 1.21 x 10$^{-9}$
• B. 1.21 x 10$^{-10}$
• C. 2.42 x 10$^{-10}$
• D. 2.1 x 10$^{-11}$

Hint:

The Ksp of a sparingly soluble salt is calculated by squaring its solubility.