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post #6 of (permalink) Old 02-11-2013, 02:27 PM
Mark Fisher
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Join Date: Dec 2011
Location: Rockport, Texas
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At pH 6.37 and below, most CO2 would be carbonic acid; between 6.37 and 10.3, most would exist as bicarbonate, and above 10.3 it would be mostly carbonate.

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