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You forced the liquids to mix with each other. However, that mixing doesn’t last long! If you look at the bottle again after a minute or so, you’ll see that the water and oil have separated once again. You can get oil and water to mix together for longer periods. You just have to add an emulsifier. That’s a molecule with one end that has ...
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- Molecules
- Like Dissolves Like
- Making Oil and Water Mix
- Density and Immiscibility
The saying in chemistry is that "like dissolves like." What this means is the polar liquids (like water) dissolve in other polar liquids, while nonpolar liquids (usually organic molecules) mix well with each other. Each H2O or water molecule is polar because it has a bent shape in which the negatively charged oxygen atom and the positively charged ...
Chemistry has tricks for getting oil and water to interact. For example, detergent works by acting as emulsifiers and surfactants. The surfactants improve how well water can interact with a surface, while the emulsifiers help oil and water droplets mix together.
Oil floats on water because it is less dense or has lower specific gravity. The immiscibility of oil and water, however, is not related to the difference in density.
- Anne Marie Helmenstine, Ph.D.
Oil and water are two liquids that are immiscible, meaning they will not mix together. Liquids tend to be immiscible when the force of attraction between the molecules of the same liquid is greater than the force of attraction between the two different liquids.
Oil Does Not Mix With Water Because of Polarity. Oil and water don’t mix because oil is made up of non-polar molecules while water molecules are polar. Estrella Mountain Community College explains how water molecules are attracted to other water molecules and thus exclude the oil molecules which are not electrically charged. This exclusion ...
Feb 12, 2020 · The two can be forced to mix by adding an emulsifier which creates a mixture of water with oil molecules spread evenly through it or vice versa. Oil and Water Science Experiments. Use water and oil to demonstrate density. You can make a very simple density jar with just oil and water or use other liquids to make a more complex density column.
Oct 21, 2024 · Older students (grades 3-5) can start discussing density in simple terms such as oil is less dense than water. While middle school students (grades 6-8) can learn more about molecular structures and why oil and water don’t mix (oil is nonpolar, water is polar). Make Salad Dressing. Shake up some oil, water, and vinegar to make a tasty dressing.
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Jun 4, 2023 · The oil, being lighter, is then pushed up to the surface. Even if you shake oil and water together, they’ll quickly separate again. Gravity keeps working to pull the water down and push the oil up. This is why oil spills are so tricky to clean up from the ocean. The oil stubbornly stays on top, spread out by waves and currents.
