The density differences allow water to separate by gravity. With enough time in a non-turbulent state, the differing specific gravities will naturally separate. Two immiscible liquids, oil and water, can be separated by using Separating Funnel. The mixture of oil and water forms two separate layers because they are completely insoluble in each other. Oil forms the upper layer while water forms lower. However, it takes time for the oil to separate. Depending on the difference in density between oil and water, the temperature, the size of the oil droplets in the mixture and the type of oil, the separation may take from minutes to days.
This is the situation with pure water and pure oil. The less dense liquid will rise to the top. This is why oil floats above vinegar in a bottle of salad dressing before it is shaken. Try watching this video on www. Have you ever made salad dressing at home with olive oil and vinegar? So in that salad dressing example, the oil is less dense than the vinegar, or it has less mass per unit of volume.
Hi Armen, I think you may be asking about the density of the liquids. If you have more of the liquid, you will have more mass.
The density is the amount of mass per unit volume. The density depends on what kind of liquid it is, and a smaller amount on the temperature and pressure. And, because oil is less dense, it floats on top of the water. Oil floats on water because it is less dense than water. Why oil floats on water The reason oil floats on water is not a question of its mass, but rather its density.
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