Question

What is the solubility of carbon dioxide (in units of grams per liter) in water at 25 °C, when the CO2 gas over the solution has a partial pressure of 0.434 atm? kH for CO2 at 25 °C is 3.36×10-2 mol/L·atm. g/L

Answer 1

So,

Henry's law, tells us that the mass of a dissolved gas in a given volume of solvent at equilibrium is proportional to the partial pressure of the gas.

We could write:

Replacing our values, we have:

We're asked to express this concentration in units of grams per liter.

For this, multiply by the molar mass of CO2:

So the answer is 0.64g/L.