When soap molecules are dissolved in water in a pool, the soap molecules migrate to the surface of the water and actually coat the surface, with the polar heads being dissolved in the water and the non-polar tails sticking out into the air above the surface of the water.

(a) Draw the scenario just described.

(b) Using the rule of thumb “like dissolves like,” explain why the soap molecules at the water’s surface align as described.

(c) Water bugs can “walk” on the surface of a pool’s water, but if you put soap in the water, they fall through. Why do you think this is?