Kristen P. Groden was having abdominal pain and was told by her doctor to have a

Question

Kristen P. Groden was having abdominal pain and was told by her doctor to have an X-ray taken of her gastrointestinal system. The intestines are transparent to X-ray, so the radiologist gives Kristen a "barium cocktail" to drink. This mixture, containes barium sulfate, BaSO_4, which is opaque to X-rays and will allow her gastrointestinal system to be photographed. Barium ion is quite poisonous, but since BaSO_4 has a very low solubility it can be ingested safely for the X-ray. The solubility of BaSO_4 is 2.4*10^-3 g/L at room temperature. What is the value of K_sp for BaSO_4 at this temperature?

Explanation / Answer

Ksp = s^2 = (2.4 x10^ -3)^2 = 5.76 x10^ -6

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