Indicate whether each statement is true or false: (c) As you cool a saturated solution from high temperature to low temperature, solids start to crystallize out of solution if you achieve a supersaturated solution.

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Understand the concept of a saturated solution: A saturated solution is one in which the maximum amount of solute has been dissolved in the solvent at a given temperature.

Recognize the effect of temperature on solubility: For most solids, solubility increases with temperature. Therefore, as the temperature decreases, the solubility of the solute typically decreases.

Consider what happens when a saturated solution is cooled: If a saturated solution is cooled, the solubility of the solute decreases, and the solution may become supersaturated if it contains more solute than can be dissolved at the lower temperature.

Define a supersaturated solution: A supersaturated solution contains more dissolved solute than is present in a saturated solution at the same temperature. This state is unstable.

Determine the outcome of cooling a saturated solution: As the solution becomes supersaturated upon cooling, the excess solute will tend to crystallize out of the solution, returning the solution to a saturated state.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Saturated Solution

A saturated solution is one in which the maximum amount of solute has been dissolved in a solvent at a given temperature. At this point, any additional solute will not dissolve and will remain as a solid. The solubility of a solute typically increases with temperature, meaning that more solute can be dissolved at higher temperatures compared to lower ones.

Supersaturation

Supersaturation occurs when a solution contains more dissolved solute than it would under normal circumstances at a given temperature. This state is unstable, and any disturbance can lead to the rapid crystallization of the excess solute. Supersaturation can be achieved by cooling a saturated solution without allowing the solute to crystallize out immediately.

Crystallization Process

Crystallization is the process by which solute particles come together to form a solid crystal from a solution. When a supersaturated solution is cooled, the solute may begin to crystallize out as the solubility decreases with temperature. This process is driven by the system's tendency to reach a lower energy state, resulting in the formation of solid crystals from the excess solute.

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