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Water and oil do not combine because water molecules are polar in nature, while oil molecules are non-polar. Oil also floats on water, because oil molecules have a lower density than water molecules.
Polarity means that one end of a given molecule is positively charged, while the other end is negatively charged. Polar solvents such as water will only successfully dissolve other polar molecules, which excludes oil molecules.

Why Oil and Water Don't Mix - Science Project Ideas

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Sep 12, 2016 ... Oil and water can be forced to mix together by adding an emulsifier (see 'Making an ... If the oil doesn't sink, sprinkle on a bit more salt. The oil ...

Why Don't Oil and Water Mix? - Chemistry for Kids | Mocomi

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There are two main reasons why don't oil and water mix even if they are put in the same container. Both these reasons consider these two substances on a very ...

Everyday Chemistry - Why Oil and Water do not mix?

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There is a perfectly good explanation for why oil and water do not mix. ... Every noticed that if you apply oil on your hand and wash it under water, the water doesn't stick to ... This eventually causes the oil molecules, or lipids, to clump together.

Oil and Water | Questacon - The National Science and Technology ...

www.questacon.edu.au/outreach/programs/science-circus/videos/oil-and-water

Even when you mix oil and water together they still separate. The oil always floats to the top because it is less dense than water. Oil and water don't mix because ...

Why doesn't oil and water mix? | Reference.com

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Oil and water don't mix because water molecules have a small positive charge at one end, and a small negative charge at the other end, so they stick to each ...

Why don't vegetable oil and water mix? | Reference.com

www.reference.com/science/don-t-vegetable-oil-water-mix-7556d66ad8f15586

Oil and water don't mix because of a difference between the molecular structure of ... Though oil and water naturally separate from each other, that doesn't mean it's ... by simply shaking oil and water together is known as a loose emulsification.

Why don't oil and water mix? | Reference.com

www.reference.com/science/don-t-oil-water-mix-5fa85ae059405d10

Oil and water do not mix because the molecules in water are polar, which causes them to be ... When the oil molecules are excluded from the water molecules, they clump together with one another. ... Why doesn't oil dissolve in water? A: Oil  ...

Why don't oil and water mix? - Instant Answer

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Jul 29, 2015 ... The structure of oil's molecules makes it hydrophobic, so it won't mix with water's ... When we mix water and alcohol, they mix together.

www.ask.com/youtube?q=Why Doesn't Oil and Water Mix Together?&v=h5yIJXdItgo
Oct 10, 2013 ... View full lesson: http://ed.ted.com/lessons/why-don-t-o... Salt dissolves in water; oil does not. But why? You can think of that glass of water as a ...