tàn​suān

carbonate

碳酸 tàn​suān
carbonate noun
a salt or ester of carbonic acid

Calcium carbonate is the main component of marble.

carbonic acid noun
a weak chemical acid formed when carbon dioxide dissolves in water

Carbonic acid decomposes into water and carbon dioxide when heated.

Frequency

Movie subtitles
0.920 per million appears in 0% of films
Written text
3.21 per million

Sources

Definitions
CC-CEDICT