Question

1. based on figure 1, soap molecules interact differently with water than with oil or fat because

○ some regions of the molecule are polar, while others are non - polar.
○ water is non - polar but oil is polar.
○ oil is less dense than water and so is soap.
○ some regions of the molecule are destroyed by water, while others are not.

Explanation:

Soap molecules have a polar (hydrophilic) head and a non - polar (hydrophobic) tail. Water is polar, so the polar heads interact with water. Oil and fat are non - polar, so the non - polar tails interact with them.

• The statement “water is non - polar but oil is polar” is incorrect. Water is polar and oil is non - polar.
• The density of oil and soap being less than water does not explain the different interactions with water vs oil/fat.
• Soap molecules are not destroyed by water in the context of interaction differences.

Answer:

some regions of the molecule are polar, while others are non - polar.