Final answer:
To determine if a solution is saturated or unsaturated, we need to compare the amount of solute dissolved in the solution to the solubility of the solute at that temperature.
Step-by-step explanation:
To determine if a solution is saturated or unsaturated, we need to compare the amount of solute dissolved in the solution to the solubility of the solute at that temperature. In this case, you dissolved 10 g of KCl in 100.9 g of H2O at 90 °C. To determine if the solution is saturated or unsaturated, we would need to know the solubility of KCl at 90 °C. If the amount of KCl you dissolved is equal to or less than the solubility at that temperature, then the solution is saturated. If the amount of KCl you dissolved is greater than the solubility, then the solution is unsaturated.