Question

What is the formula for Calcium Carbonate?

Answer 1

`CaCO_3`

Explanation:

`"Calcium carbonate"` is reasonably insoluble. When you bubble carbon dioxide gas thru lime water (`Ca(OH)_2(aq)`) you see a white precipitate of the carbonate:

`Ca(OH)_2(aq) + CO_2(g) rarr CaCO_3(s)darr +H_2O(aq)`