Answer to Question #63482 in General Chemistry for Ashley

Question

The chief compound in marble is CaCO3. However, marble is readily attacked by acids.
[Ca^2+] in normal rainwater of pH 5.0 = 0.024 M
a) Determine the molar solubility of marble (that is, [Ca^2+] in a saturated solution).
b) Determine the equilibrium constant for the overall reaction that occurs when marble reacts with acid
CaCO3 (s) + H3O^+ ↔ Ca2+ (aq) + HCO3- (aq) + H2O (l)
My problem is that I have been given no more information other than what is written above. I'm not sure how to go about solving it with this amount of information