In preparation for a different solubility determination, a student measured the mass of an empty beaker (25.62 g) on a balance. Then, KNO3 was added to the beaker and the mass recorded again as 35.18 g. Finally, water was added to the flask and the mass determined to be 50.03 g. The temperature of the mixture was increased until all of the solid had just dissolved. What was the solubility at this final temperature?
