Answer: The solution is said to be saturated.
Explanation: A saturated solution is a solution in which the maximum amount of solute has been dissolved in a solvent at a particular temperature, such that any additional amount of solute will not dissolve.
In the case of NaCl at 50°C, the solubility of NaCl in water is 50g per 100g of water. Therefore, if 50g of NaCl is added to 100g of water at 50°C, it will dissolve completely, resulting in a saturated solution. Any additional NaCl added to the solution will not dissolve, as the solvent has already reached its maximum capacity to dissolve NaCl at this temperature. As a result, the excess NaCl will remain undissolved and settle at the bottom of the container.