#### Answer

a. This solution is unsaturated.
b. This solution is unsaturated.
c. This solution is saturated.

#### Work Step by Step

1. Find the amount of solute in 100 g of water.
a. 25 g of KCl
b. $$100 \space g \space H_2O \times \frac{11 \space g \space NaNO_3}{25 \space g \space H_2O} = 44 \space g \space NaNO_3$$
c. $$100 \space g \space H_2O \times \frac{400. \space g \space sugar}{125 \space g \space H_2O} = 320 \space g \space sugar$$
2. Compare these values to the solubility for $20^o \space C$ (Table above).
If the calculated value is lower than the solubility in the table, the solution is unsaturated.
If the calculated value is equal or greater than the solubility in the table, the solution is saturated.
a. 25 g < 34 g, the solution is unsaturated.
b. 44 g < 88 g, the solution is unsaturated.
c. 320 g > 204 g, the solution is saturated.