(flÄt) n. 1. A number of warships operating together under one command. 2. A number of vessels having a shared origin, purpose, or area of operation: the Japanese merchant fleet; the North Pacific fishing fleet. 3. A group of vehicles, such as taxicabs or airliners, owned or operated as a unit.
No AgCl is not soluble, the reasoning of it being soluble because NaCl is, is incorrect. NaCl is soluble because it is a group 1 metal. AgCl is no because it forms a precipitate.
Sodium chloride was needed to ensure the proteins in the cell aren't separated from the rest of the solution with the DNA. Okay, the person above does not understand Chemistry nor the English language. The sodium chloride, NaCl, is a polar molecule, which would help separate an emulsion of two layers in an acid-base extraction. Since NaCl is polar, it would be easily dissolved into the solution and tie up the different layer molecules.