Whats the molar concentration of Ba^2+ in that sulrry really In calculating the ionic strength inQ24b we assumed that the Ba^2+ and the SO_4^2+ didnt contribute significantly

Question Show transcribed image text Barium enema is a diagnostic medical procedure in which the inside of the large intestine is coate with an aqueous slurry o finsoluble BaSO_4 and imaged using X-ray. If youre a chemist this probably rings all sorts of alarm bells because Ba is a heavy metal thats absorbed throughout the gastrointestinal trat and levels in dtinking water as low as low 10 mg/l(about 7 times 10^-5 M) have been show to result in an elevates risk of heart attack and strocke. If yourask the medical folks theyll ssay Oh thats not a problem because BaSO_4 is completely insolubility product for BaSo_4 so theres got to be a little Ba^2+ in that solution. So whaat is the molar concentration of Ba^2+ in a saturates solution of BaSO_4 in deionized water Of course they dont make this slurry in deionized water. They make it up in a saline solution that contains 0.137 M NaCl 0.0809 M Na_2HPO_4^- ions) Assuming that no acid-bade shenanigans take place whats the ionic strength of this solution ignoring the contribution of Ba^2+ ans SO_4^2+ thatll be pressent Whats the molar concentration of Ba^2+ in that sulrry really In calculating the ionic strength inQ24b we assumed that the Ba^2+ and the SO_4^2+ didnt contribute significantly. Is that a reasonable assumption

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