In a reaction, what happens if more solute is added to a saturated solution at a fixed temperature?

• A. It remains undissolved
• B. It dissolves completely
• C. It reacts
• D. It evaporates

Answer: (A)

At a fixed temperature, a saturated solution contains the maximum amount of solute that can dissolve. The solubility limit is reached, so when more solid is added, the solution cannot take it in. The extra solute stays as a solid and remains undissolved at the bottom while the dissolved part stays the same. The system is in dynamic balance: some solid may dissolve and crystallize, but the overall amount dissolved doesn’t increase unless the temperature changes. So the most accurate outcome is that the added material remains undissolved.