Chemical equation---calcium carbonate

Sodium carbonate solution can react with calcium chloride solution to give calcium carbonate precipitate.

Full equation:
CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + CaCl2(aq)

Ionic equation:
Ca2+(aq) + CO32-(aq) → CaCO3(s)

Other soluble metal carbonates (potassium carbonate or ammonium carbonate) can also be used, and the ionic equation is as same as above.
=

2008-10-23 02:17:45 補充：
The full equation should be:

CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl(aq)

Na2CO3 /K2CO3

Because CaCl2, Na2CO3 and K2CO3 are soluble in water

While CaCO3 is insoluble in water >>>ppt