Although soluble barium compounds are toxic, suspensions of insoluble barium sulfate are routinely swallowed for upper gastrointestinal x-ray studies. why is barium carbonate not used? 1. barium carbonate is soluble in plain water. 2. stomachs contain hcl and all carbonates dissolve in acid. 3. all carbonates are toxic, whether soluble or not. 4. barium carbonate is too expensive.
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