4. Crystallization: Use the graph depicting solubility of potassium nitrate (KNO3) in water in Figure 6.5-1 of the textbook to calculate how much KNO3 can be removed as solid (filtered) from a 1-kilogram solution of 60 wt% KNO3 in water (40 wt%) at 65 C, when it is cooled to 25 C. Note that the 60 wt% value is given on a basis of total solution mass, which is different than the values presented in the graph