Question

In an oil spill, why does the oil not mix with the seawater? Lipids are hydrophobic. Lipids are hydrophilic. Lipids are saturated. Lipids are unsaturated.

Answer 1

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Liquid water is held together by hydrogen bonds. Oils and fats not have any polar part and so for them to dissolve in water they would have to break some of water's hydrogen bonds. ... Water will not do this so the oil is forced to stay separate from the water.

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Answer 2

In an oil spill, the oil does not mix with seawater because lipids are hydrophobic.

• During an oil spill, liquid petroleum is released into the marine ecosystem.
• The liquid petroleum or oil stays on the surface of the water and does not mixes with it.
• Oil or lipids are non-polar solvents hence the molecules of oil do not have dipole movement.
• On the other hand, water is a polar solvent which means it is positively charged at one end and negatively charged at another end.
• Since lipids molecules only have a negative charge around them they tend to stay away from molecules of water, or we can say lipid molecules are hydrophobic.
• Also, the molecules of water have hydrogen bonds. Lipids cannot break the hydrogen bond hence, water and oils are immiscible liquids.
• Water can be mixed with other polar solvents such as acetone and alcohol.
• Similarly, oils can be mixed with another non-polar solvent such as - alkanes and aromatics.

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