Question

1. explain how temperature affects the rate of sugar dissolving in water. 20. describe a real-life example of a diluted solution.

Explanation:

Question 19:

Temperature affects the kinetic energy of molecules. Higher temperature (e.g., hot water) gives sugar molecules and water molecules more kinetic energy, increasing collision frequency and energy. This speeds up the dissolution as more sugar particles break apart and mix with water. Lower temperature (e.g., cold water) has less kinetic energy, so dissolution is slower.

A diluted solution has a low solute - solvent ratio. For example, making lemonade: start with a concentrated lemon juice - sugar mixture, then add a large amount of water. The final lemonade has a small amount of solute (lemon juice, sugar) dispersed in a large volume of solvent (water), resulting in a diluted solution with a milder taste.

Answer:

Higher temperature increases the rate of sugar dissolving in water by increasing molecular kinetic energy (more frequent, energetic collisions); lower temperature decreases the rate.

Question 20: