Chemical Equilibrium
The above shows a container with water and carbon dioxide
) gas, which have reached an equilibrium state after enough time passes at
°C. Which of the following statements is correct?
a) There are no molecules that dissolve into the water at the equilibrium state.
b) If we remove the weight, then the mass of dissolved into the water decreases.
c) If we add helium gas in the container, then the mass of dissolved into the water decreases.
Note: Assume that carbon dioxide gas follows Henry's law, and ignore the frictional force of the piston.
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1 solution
B follows from Henry's Law For option C,notice that when you add helium into the container, you add it at constant volume However you decrease the mole-fraction of gas dissolved in the solution (which now has an extra gaseous component) Hence X(CO2) decreases and subsequently to ensure Henry's Law holds,mass of dissolved CO2 decreases too