Water does not easily remove grease from dishes or hands because grease is nonpolar and water is polar. The addition of soap to water, however, allows the grease to dissolve. Study the structure of sodium stearate (a soap) and describe how it works.

Video transcript

Hi everyone here we have a question that says all oils blow on the surface of water because they have a lower density than water and because they cannot mix with water, oils and water do not mix because oils are non polar and water is a polar liquid, oils are very complex mixture of various triglycerides. One of the most commonly occurring triglyceride is trialing, which makes up most of olive oil. Look at the structure of trialing and explain why it does not make a homogeneous mixture with water. Trialing contains a lot of C. H bonds, which are non polar, which makes the molecule non polar so it does not mix with water. And that is our final answer. Thank you for watching. Bye.