A GIF of the simulation you have been working with is shown below. Observe that a water molecule slows down and seems to lose kinetic energy when it collides with the ionic compound KI. This collision causes the ionic compound KI to split into a K⁺ cation and an I⁻ anion.

Where does the kinetic energy of the water molecule go? We will explore this question further in your homework and again in the next lesson.