saturated unsaturated supersaturated solution

What is saturated solution? / What is unsaturated solution? / What is supersaturated solution?

You’re stirring a spoonful of sugar into your cup of tea. At first, it vanishes, dissolved into the liquid, leaving behind no trace of its crystal form. Have you ever wondered why there’s a limit to how much sugar your tea can take? Why, no matter how much you stir, there comes a point when it just won’t dissolve anymore? The answer lies in the solution.

Saturated solution:

Saturated-solutions is a solution in which no more solute can be dissolved at a certain temperature, any additional solute added will not dissolve and will settle at the bottom of the container. For dissolving more solute in this liquid, the liquid should be heated and then the solute can dissolve again in this solution.

Example: A classic example of a saturated solutions is sugar water. If you keep adding sugar to a glass of water and stirring until no more sugar can dissolve, you have a saturated sugar solutions. The excess sugar that doesn’t dissolve collects at the bottom of the glass.

saturated solution

Unsaturated solution:

Unsaturated solution is a solution where more solute can be added to the solution at a constant temperature. In other words, there is still room for more solute to dissolve in the solvent. Unsaturated solutions can be created by adding less solute than the solubility limit or by lowering the temperature, which reduces the solubility of the solute.

Example: Consider a glass of iced tea. If you dissolve a teaspoon of sugar in a glass of iced tea and it completely dissolves, you have an unsaturated sugar solution. There is still room for more sugar to dissolve in the tea.

Supersaturated solution:

Supersaturated solution is a solution in which after the saturation point we dissolve more solute by increasing temperature. It is related to how much temperature increases and how much extra solute will dissolve with respect to temperature 

For Example: At 30℃, 1 litre of water can dissolve 30 grams of sugar. And this same amount of water when heated up to 60℃ can dissolve 50 grams of sugar. This extra 20-gram sugar changes back into a semi-solid when the temperature again comes down to 30℃.


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