One-half gram of solid calcium sulfate, CaSO4 (s) is added to 1.0 L of pureProblem 7. water. Immediately the solid begins to dissolveaccording to the following reaction: \begin{array}{l} \mathrm{CaSO}_{4}(\mathrm{~s})<=>\mathrm{Ca}^{+2}+\mathrm{SO}_{4}^{-2} \text

{and the } \mathrm{K}_{\mathrm{sp}}=2 \\ \times 10^{-5} \end{array} What is the concentration of dissolved sulfate[SO4-2] in the water once equilibrium is achieved? (hint: your SO42 is the lesser of what Ksp allows, or what you added). Do you have solid left?