Here's why:
* Density: Density is a measure of mass per unit volume. Dichloromethane has a density of about 1.33 g/mL, while water has a density of 1.00 g/mL.
* Immiscibility: Dichloromethane and water are immiscible, meaning they don't mix. This is due to their different polarities - water is highly polar, while dichloromethane is less polar.
* Gravity: When you mix these two liquids, the denser liquid (dichloromethane) will sink to the bottom due to gravity.
In short, dichloromethane is heavier than water, so it settles at the bottom of the container.
