One gram of solid calcium sulfate, CaSO4(s), is added to 500 mL of pure water. Immediately, the solid begins to dissolve according to the following reaction:
CaSO4(s) ? Ca2+ + SO42-
What is the concentration of dissolved sulfate in the water once equilibrium is achieved? If additional 10 grams is added, what would be the new equilibrium concentration of calcium sulfate?