Solid - Liquid Equilibrium

The video explains the process of dissolving sugar in water to form a dilute solution, which becomes concentrated upon heating. When cooled, sugar crystals form, leading to a saturated solution where no more sugar can dissolve. This state represents an equilibrium between the dissolved sugar and the solid sugar, with the rates of dissolution and crystallization being equal.

What happens when sugar is added to water and stirred?

• The water evaporates quickly.

• Sugar crystals immediately separate out.

• A dilute sugar solution is formed.

• A concentrated sugar solution is formed.

What occurs when a dilute sugar solution is heated?

• It becomes a saturated solution.

• It turns into a thick and concentrated solution.

• The sugar dissolves completely.

• The solution freezes.

What is a saturated solution?

• A solution where no more solute can be dissolved at a given temperature.

• A solution that can dissolve more solute at any temperature.

• A solution that is always dilute.

• A solution that evaporates quickly.

What happens when a concentrated sugar solution cools?

• It becomes more dilute.

• Sugar crystals separate out.

• The solution evaporates.

• The sugar dissolves further.

What does equilibrium in a sugar solution mean?

• The solution is always dilute.

• The sugar never crystallizes.

• The rate of sugar dissolution equals the rate of crystallization.

• The solution is always saturated.