To extend this activity to better meet the national standards, students should develop their own questions related to solubility of vitamins that can be answered by scientific investigations.
Students conduct an investigation to determine the solubility of vitamins in water and in oil.
Students use evidence from their investigation to propose explanations for how vitamin solubility affects the storage of vitamins in the body. Students explain how the manner in which different vitamins are stored influences the desired frequency of vitamin intake. A and E is their insolubility in water, which is due to the small proportion of polar groups. Their structures consist mostly of nonpolar carbons and hydrogens. Vitamin C contains many polar -OH groups, making it attractive to polar water which can dissolve it.