Remove carbon dioxide from solution [closed]








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What solution could I add to a solution of water with dissolved carbon dioxide in order to get the carbon to precipitate out? I believe the ions are H+ and HCO3-


Thanks, Jerid




Adding aqueous Ca(OCl)2 to CO2/H2O will create a precipitate of CaCO3 and Hypochlorous acid (HOCl).


$\ce{Ca(OCl)2 + CO2 + H2O -> CaCO3 (s) + 2 HOCl}$


[Per a source](https://ajph.aphapublications.org/doi/pdfplus/10.2105/AJPH.4.5.423), 'A STUDY OF CALCIUM HYPOCHLORITE AS A DISINFECTANT OF WATER', to quote:



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> The dissolved calcium hypochlorite reacts with the free carbonic acid and half bound carbonic acid in the water and there is formed calcium carbonate, and at the same time free oxychlorid, which is known technically as hypochlorous acid.
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> 


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I would rather add chalk water, which is a solution of $Ca(OH)\_2$. At least it will not create a new substance dissolved in water, because the reaction will be : $$Ca(OH)\_2 + CO\_2 -> CaCO\_3 + H\_2O$$ and $CaCO\_3$ is an insoluble substance.


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