At 25 degrees Celsius, 36 g of sodium chloride dissolves fully in 100 g of water to give a saturated solution. What is a solution containing 40 g of NaCl in 100 g of water at the same temperature?

1. The saturation limit at 25 degrees Celsius is 36 g of NaCl per 100 g of water. 2. The given solution holds 40 g, which is more than the saturation limit of 36 g. 3. A solution that contains more solute than the saturated value is supersaturated; it is not merely unsaturated, which would need less than 36 g. 4. Therefore 40 g of NaCl in 100 g of water at 25 degrees Celsius is supersaturated. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 9 Solutions "Types of Solutions", p.134_