What is the molality of a solution in which 2.3 g #O_2# gas dissolved in 355 g of water?
Molality can be found using the equation below:
What you want to do now is determine what the solute and solvent are. A solute is dissolved in the solvent and the solute is the "minor component in a solution."The solvent is usually water or it is the substance that you have more of. In our case, the solute is
As we can see from the equation, the solute and solvent have the wrong units. Let's start by converting grams of
Now we need kg of solvent instead of the grams that we're given. Let's use this relationship:
Now all we do is plug the values into the equation like this: