Recovering KNO3 from Aqueous Solution at 10°C

[synergix]

Homework Statement

The mass of potassium nitrate that could be recovered from a solution prepared at 60deg Celsius from 250g potassium nitrate and 250g water by cooling the solution to 10 deg Celsius.

Homework Equations

The Attempt at a Solution

not to sure how to start this one any help would be appreciated

 

[synergix]

at 60oC the solution can be saturated> 1:1 ratio so I figure once I know the solubility at 10oC I simply multiply 250g by the ratio? I am not to sure what the solubility of KNO3 at 10oC is