Chemistry lesson: calcium carbonate solubility Cortney September 12, 2015 Random + aragonite, calcite, chemistry, limestone Leave a replyThe big equations: CaCO3 ⇌ Ca2+ + CO32- CaCO3 (s) + H2CO3 (aq) ⇌ Ca2+ (aq) + 2HCO3- (aq) Read more →