23. Lipids

Draw the condensed structural formula for a glycerophospholipid that contains glycerol, two stearic acids, phosphate, and ethanolamine (ionized).

Mayonnaise is a thick mixture containing oil, vinegar (water-based), and eggs; the eggs contain a phospholipid molecule called lecithin. Mayonnaise cannot be made without lecithin. Explain why lecithin is a critical ingredient.

Compare the structure of a soap molecule to a phospholipid and explain why a soap’s polar head is smaller than that of a phospholipid.