Q.

When CO2 is bubbled in excess of water, the following equilibrium is established. CO2+2H2O⇌H3O++HCO3−, Kc=3.8×10−7,PH=6. What would be the [HCO3−][CO2] ?

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a

6

b

0.0038

c

0.038

d

0.38

answer is D.

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Detailed Solution

CO2+2H2O⇌H3O++HCO3− Kc=[H3O+][HCO3−][CO2] 3.8×10−7=10−6×[HCO3−][CO2] [HCO3−][CO2]=3.8×10−1=0.38
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When CO2 is bubbled in excess of water, the following equilibrium is established. CO2+2H2O⇌H3O++HCO3−, Kc=3.8×10−7,PH=6. What would be the [HCO3−][CO2] ?