If crystals start forming when a solution is cooled, what is this related to?
Answer and explanation
Correct answer: Decrease in solubility on cooling
Many solids are more soluble in a hot solvent than in a cold one. On cooling, the equilibrium solubility decreases; the solution then contains more dissolved solute than the lower-temperature limit allows. The excess separates from the solution as crystals. This is ordinary crystallisation and does not require the solvent to disappear or a gas to freeze. The exact behaviour depends on the substance.
Frequently asked questions
What is the correct answer to this question?
Decrease in solubility on cooling
Why is this the correct answer?
Many solids are more soluble in a hot solvent than in a cold one. On cooling, the equilibrium solubility decreases; the solution then contains more dissolved solute than the lower-temperature limit allows. The excess separates from the solution as crystals. This is ordinary crystallisation and does not require the solvent to disappear or a gas to freeze. The exact behaviour depends on the substance.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
