Carbonate

Dissolved carbon dioxide contributed to carbonate compounds. Some carbonates precipitated, meaning they formed solid material that settled as sediment. Marine organisms also used carbonate to make shells and skeletons.

Acids react with certain metals and with metal carbonates, but the products are different.

First identify whether the reactant is a metal or a carbonate. Use the appropriate reaction pattern to list all the products. Next, name the salt from the metal and acid: magnesium with hydrochloric acid gives magnesium chloride; a carbonate containing calcium with sulfuric acid gives calcium sulfate.