To determine whether the solution is dilute, saturated, unsaturated, or supersaturated, we need to compare the amount of KNO3 that is dissolved in the solution at 60°C to the maximum amount of KNO3 that can be dissolved in water at 60°C.
The solubility of KNO3 in water at 60°C is 110 g per 100 g of water. Since only 80 g of KNO3 was dissolved in 100 g of water, the solution is unsaturated.
Therefore, the answer is unsaturated.