Clark Chemistry Calculations.pdf ((link)) | Jim

Calcium carbonate reacts with hydrochloric acid: $CaCO_3(s) + 2HCl(aq) \rightarrow CaCl_2(aq) + CO_2(g) + H_2O(l)$

Jim Clark laid this out perfectly over 20 years ago, and his PDF remains the best $0 you will ever spend on your chemistry education. Jim Clark Chemistry Calculations.pdf