Question

1. why does it take food coloring longer to dissolve in cold water then in hot water?

Explanation:

The kinetic energy of water molecules is lower in cold water. Molecules in hot water move faster, collide more frequently with food - coloring particles, and help them dissolve quicker. In cold water, slower - moving molecules result in less frequent and less energetic collisions, thus taking longer for the food coloring to dissolve.

Answer:

The lower kinetic energy of water molecules in cold water leads to less frequent and less energetic collisions with food - coloring particles, causing it to dissolve more slowly compared to hot water where water molecules move faster and aid in quicker dissolution.