MCQM4153 · [1] Dissolved carbon dioxide in seawater reacts with water to form carbonic acid, which dissociates. Reef-building corals deposit calcium carbonate in their skeletons. Which change in seawater accompanies rising dissolved carbon dioxide concentrations? ARising hydrogen ion concentration and falling carbonate ion concentrationBRising hydrogen ion concentration and rising carbonate ion concentrationCFalling hydrogen ion concentration and falling carbonate ion concentrationDFalling hydrogen ion concentration and rising hydrogen carbonate ion concentration Next question →