How can grouping objects based on solubility in water help us?

Does mature human red blood cells fight pathogens? What are the functional areas in bloomsbury? How did the eruption of Mount Shasta effect people? Does Florida or Michigan have longer daylight in the summer? What is after diffusion when the particles are evenly spread out? What is a Leucoplasts? What factor in reaction rate is related to the amount of reactants? What is sulfide? What are three types of stream deposits? What process put carbon dioxide into the air? Where do you find Alternating current? Retinol is another name for what vitamin? Does Bisphenol a soluble in water? The enzymes amylase works best at 6.5 we would expect it to denature at a pH of 3.5? What is the -10 position of the gene called? What is Saturn's surface made up of? If C02 is M equals 44 but you have 12 moles of that do you do 44 x 12? When a substance changes from one phase to another what occurs? What is an imaginary line that runs through both poles in the earth? What is a life threatening reaction to a foreign substance?