Homework Help: Chemistry

Posted by Jematormal91 on Saturday, March 24, 2012 at 8:20pm.

Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation.

The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. K=0.032 M/atm

For a CO2 partial pressure of 2.4×10-4 atm in the atmosphere, what is the pH of water in equilibrium with the atmosphere?

Chemistry - Hazel, Wednesday, October 24, 2012 at 9:54pm
Since carbonic acid is primarily dissolved CO2, the concentration of H2CO3 can be taken as equal to that of dissolved CO2,
[H2CO3]=[CO2aq]
The equilibrium equation for the dissolution of gaseous CO2 can be used to calculate the [CO2(aq)] and, hence, the [H2CO3]. The [H2CO3] will then be used to calculate the pH. Dissolved CO2 satisfies the equilibrium equation
pH=5.609
Chemistry - mnmnji, Wednesday, April 10, 2013 at 11:12am
can you show step by step how you got that pH?

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