Barium is a toxic substance that can seriously impair heart function. For an X ray of the gastrointestinal tract, a patient drinks an aqueous suspension of 20 g BaSO4. If this substance were to equilibrate with the 5.0 L of the blood in the patient’s body, what would be [Ba2+]? For a good estimate, we may assume that the Kspof BaSO4 at body temperature is the same as at 25°C. Why is Ba(NO3)2 not chosen for this procedure?
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