how is limestone formed in the oceans?\nwhen ...
how is limestone formed in the oceans?\nwhen fluoride ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.\nwhen carbonic acid ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.\nwhen carbonic acid ions in the river reacts with dissolved calcium carbonate in water, it will form carbon, which on deposition on the ocean floor becomes a limestone.\nwhen calcium ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.
Answer
# Brief Explanations:
Limestone is a sedimentary rock mainly composed of calcium carbonate ($CaCO_3$). In the ocean, calcium ions from rivers react with dissolved carbon (in the form of carbon - containing compounds like carbon dioxide which forms carbonates in water) to form calcium carbonate. This calcium carbonate then deposits on the ocean floor to form limestone.
# Answer:
When calcium ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.