Question

To from a super saturated solution of salt one must:

• A. cool slowly
• B. cool rapidly
• C. add some salt to cold solution
• D. use a clear vessel

Answer 1

The correct option is B cool rapidly

If sugar is dissolved in water, it reaches a point where you cannot dissolve any more sugar. This is called a saturated solution. However, if we heat this solution, more sugar will dissolve. When the solution is cooled rapidly, the sugar will remain in solution. This is called a supersaturated solution, which is very unstable and will crystallize easily