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Estimate the carbon dioxide content of a natural water sample in mg/L which has a pH of 7.5 and a bicarbonate-ion concentration (asHCO3) of 50mg/L.

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Estimate the carbon dioxide content of a natural water sample in mg/L which has a pH of 7.5 and a bicarbonate-ion concentration (asHCO3) of 50mg/L. Assume that the effect of the dissolved solids on ion activity is negligible and the water temperature is 25C. Hint: KA for carbonic acid (H2CO3) at 25C is 4.3107. (10 points)

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