Register to reply

Why oil and water do not mix?

by bgq
Tags: water
Share this thread:
Feb17-13, 10:01 AM
P: 144

Why do oil and water not mix? We know that some liquids mix together while others not, I am looking for the reason of this.

Thanks to any replies
Phys.Org News Partner Physics news on
Vibrational motion of a single molecule measured in real time
Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field
Bubbling down: Discovery suggests surprising uses for common bubbles
Feb17-13, 11:01 AM
P: 11,831

The attraction between two water molecules is much stronger than the attraction of a water molecule and an oil molecule (or two oil molecules), so they tend to stay together.

You can mix them with soap (as a simplified model, long molecules where one side is attracted by water molecules and the other sticks to oil molecules).
Feb19-13, 05:47 AM
P: 144
Thank you very much.

Register to reply

Related Discussions
If an ice cube floating in a glass of water melts, won't the water level decrease? Introductory Physics Homework 3
Cooling hot water by adding in cool water and draining out the hot water - Formulae General Physics 5
Re: Building a hydrodynamics water tunnel for surface water wheel testing. General Engineering 4
Heat power needed to partially evaporate water from a water container Introductory Physics Homework 1
Basic question regarding triple point of water and physical properties of water Introductory Physics Homework 9