Barium Is a Nonessential Element in the Human Body, but Some

question 58

Multiple Choice

Barium is a nonessential element in the human body, but some organisms build exoskeletons using barium sulfate, which has a K_sp of 1.1  10^-10 at 25°C. How many grams of barium are there in 1.0 L of a saturated solution of barium sulfate at 25°C?

• A) 4.1  g
• B) 1.4 mg
• C) 3.7 mg
• D) 7.3  g
• E) 15 ng

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Definitions:

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