In one procedure it says, "Pour the organic layer into a clean, dry 50-mL Erlenmeyer flask, add 2 g of calcium chloride..." What is the purpose of the calcium chloride?

Q: B) How the softening of tap water is carried out?

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A:

Q: 1) Give the equation for the saponification of lard (assume it is all glycerol tristearate).

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.