Sugar cubes are added to a solution of water and lemon juice to make lemonade. The solubility of sugar is 200 g/100 g #H_2O# at the temperature of the solution. What can be done to increase the rate of dissolution without affecting the solubility?

Question

Natalie Anton · Accepted Answer

#"Efficient stirring...........?"#

Of course, heating is out, because a hot solvent will hold more solute than a cold one. What you could try is a sonicator, i.e. putting your flask in an ultrasonic bath. (These are very good for cleaning too!)

Naomi Aronson · Answer

undefined To increase the rate of dissolution without affecting the solubility, you can:
1. Increase the surface area of the sugar cubes by crushing them into smaller pieces or using powdered sugar.
2. Stir or agitate the solution to enhance the mixing of sugar molecules with water molecules.
3. Increase the temperature of the solution, as higher temperatures generally increase the rate of dissolution for solid solutes like sugar, while keeping the solubility constant.