Consider the reaction CaSO4(s)⇌Ca2+(aq)+SO2−4(aq)CaSO4(s)⇌Ca2+(aq)+SO42−(aq) At 25 ∘C∘C the equilibrium constant is Kc=2.4×10−5Kc=2.4×10−5 for this reaction. If the resulting solution has a volume of 1.9 LL , what is the minimum mass of CaSO4(s)CaSO4(s) needed to achieve equilibrium?

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