A solution was prepared by dissolving 381 mg of potassium sulfate (K,SO, MW = 174.24 g/mol) in 593 mL of water. Use this information to calculate each quantity. moles of K,SO, .00219 mol millimoles of K, SO 2.19 mmol F = [K, SO.1 = .00369 M .00737 [K] = M [SO") = .00369 M ppm K, SO4 = 642 ppm %(w/v) K,SO = .0642 %(w/v) pK+ = 2.132 PSO- 2.433