The solubility, s, of calcium carbonate, CaCO3 at 25 °C is [s] = 6.90 •10-5 The reaction is: CaCO3 (s) D Ca2+(aq) + CO32-(aq) a) Calculate the concentration of Ca2+ and CO32- at equilibrium. _____________________ [Ca2+]    ___________________ [CO32-] b) Calculate the equilibrium constant for the dissolution reaction. (This equilibrium constant is also known as the solubility product, Ksp.) Keq (or Ksp)

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