Soap and Detergent Molecules Have a Long, Hydrophobic "Tail" and a Polar

question 70

Multiple Choice

Soap and detergent molecules have a long, hydrophobic "tail" and a polar, hydrophilic "head." They are sometimes referred to as "bridge molecules" because they allow oils and fats to be suspended and "dissolved" in aqueous solutions (which they otherwise would not be able to do) . Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film. In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?

• A)The soap encloses the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior.
• B)Water and dirt/oil form covalent bonds inside a small droplet that has a soap-based outer membrane.
• C)The soap molecules encase the dirt/oil within a small droplet that has a water-loving exterior and a water-repelling interior.
• D)The soap is converted into a lipid that binds to the dirt/oil while repelling the water.

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