Some liquids will mix together and some wont.
The ones that will mix together are called miscible liquids, e.g. when you put milk in your tea, the milk mixes with the tea - it doesn't float on top no matter how much you put in.
The ones that will not mix together are called immiscible liquids, e.g. if you tried to put oil in your tea, it wouldn't mix properly and the oil would float on top.
A separating funnel is used to separate immiscible liquids -
If two immiscible liquids are shaken together, when they are allowed to stand, they will separate out into layers.
The denser liquid sinks to the bottom and the less…