Chemistry: Equilibrium Math Question 4

Question

At 25 C, the partial pressure of CO₂(g) in a bottle of soda water is 1 bar. Calculate the equilibrium concentration of dissolved carbon dioxide under these conditions. The equilibrium constant for dissolving CO₂ in water is K = 0.0338

Answer 1

CO₂(gas) <===> CO₂(soln)

K = 0.0338 = [CO₂]/P(CO₂) = [CO2]/0.9869 atm (taking 1 bat = 09869 atm)

[CO₂] = 0.0338 x 0.9869 = 0.0334 M = equilibrium concentration of dissolved CO₂