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When CO2 dissolves in water, the following equilibrium is established CO2+2H2O⇌H3O++HCO3-; for which the equilibrium constant is 3.8×10-6 and pH = 6.0. What would be the ratio of concentration of bicarbonate ion to carbon dioxide?

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answer is 3.8.

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Detailed Solution

K=H3O+HCO3-CO2H2O2 As pH=6.0H3O+=10-6K=H3O+HCO3-CO2H2O2 (H2O is in excess, therefore its conc. remains constant)HCO3-CO2=KH3O+=3.8×10-610-6=3.8
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