Question

A saturated solution of BaSO4 at 250C contains 3.9 10 -5 mole/liter of Ba2+ ions. What is the Ksp of this salt?
A) 3.9 10^-5
B) 3.9 10^-6
C) 2.1 10^-7
D) 1.5 10^-8
E) 1.5 10^-9

Answer 1

Answer on Question #45030, Chemistry, Inorganic Chemistry

$$K_{sp} \left(BaSO_4\right) = \left[Ba^{2+} \right] \cdot \left[SO_4^{2-}\right]$$ $$\left[Ba^{2+} \right] = \left[SO_4^{2-}\right]$$ $$K_{sp} \left(BaSO_4\right) = \left[Ba^{2+} \right]^2 = (3.9 \cdot 10^{-5})^2 = 1.5 \cdot 10^{-9}$$

Answer E

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