A solution of 10 grams KCI at 10 degrees Celsius is said to be:

A. unsaturated
B. saturated
C. supersaturated

A. unsaturated

To determine whether the solution of 10 grams of KCI at 10 degrees Celsius is unsaturated, saturated, or supersaturated, we need to compare the actual concentration of KCI in the solution with the maximum solubility of KCI at that temperature.

To find the maximum solubility of KCI at 10 degrees Celsius, we can refer to a solubility table or look up the information online. Let's assume that the maximum solubility of KCI at 10 degrees Celsius is 20 grams.

If the actual amount of KCI in the solution (10 grams) is less than the maximum solubility (20 grams), then the solution is unsaturated.

If the actual amount of KCI in the solution (10 grams) is equal to the maximum solubility (20 grams), then the solution is saturated.

If the actual amount of KCI in the solution (10 grams) is greater than the maximum solubility (20 grams), then the solution is supersaturated.

Based on this information, we can conclude that the solution of 10 grams of KCI at 10 degrees Celsius is unsaturated because the actual amount of KCI is less than the maximum solubility.

To determine whether a solution is unsaturated, saturated, or supersaturated, we need to compare the amount of solute (in this case, KCI) dissolved in the solution with the maximum amount that can be dissolved at that temperature (known as the solubility).

One way to find the answer is to consult a solubility chart or look up the solubility of KCI at 10 degrees Celsius. The solubility of KCI at this temperature is approximately 34 grams per 100 grams of water.

If the solution contains less than the maximum amount of solute that can be dissolved at that temperature, it would be considered unsaturated. In this case, the solution contains only 10 grams of KCI, which is less than the solubility of 34 grams.

Therefore, the solution of 10 grams KCI at 10 degrees Celsius would be categorized as unsaturated (option A).