2. Consider barium ion in a saturated solution of barium sulfate in pure water at 25 C. a) Write the chemical equation that expresses solubility for this ionic salt in pure water b) Write the mathematical expression for the solubility equilibrium (solubility product) c) Calculate the concentration (mg/L) of barium in a saturated solution of barium sulfate in pure water at 25 *C. See "02 Chemistry Concepts Accessible" Slide 29. d) What is the equilibrium concentration of barium (Ba?) in water that already contains 10 % M sulfate, 50.2