Question

part 4: temperature & solubility
when sugar is added to cold water, only a small amount dissolves. when the same amount of sugar is added to hot water, more sugar dissolves.

1. which water has higher solubility for sugar?
2. why does increasing temperature increase solubility for most solids?

Explanation:

Question 1

The problem states that when the same amount of sugar is added to cold water, only a small amount dissolves, while more sugar dissolves in hot water. Solubility refers to the amount of solute (sugar here) that can dissolve in a solvent (water here) at a given temperature. Since more sugar dissolves in hot water, hot water has a higher solubility for sugar.

For most solid solutes (like sugar) dissolving in a liquid solvent (like water), increasing temperature provides more kinetic energy to the solvent and solute particles. This increased energy helps break the intermolecular forces holding the solid solute particles together and also increases the space between solvent particles, allowing more solute particles to fit in, thus increasing solubility. The higher temperature increases the rate of dissolving and the maximum amount of solute that can be dissolved (solubility) because the added energy disrupts the crystal lattice of the solid and enhances the interaction between solute and solvent molecules.

Answer:

Hot water

Question 2