chem equation

The full equation is:
CaCl2(aq) + K2CO3(aq) → CaCO3(s) + 2KCl(aq)

The ionic equation is:
Ca2+(aq) + CO32-(aq) → CaCO3(s)

This is a common equation for CE students to memorize.
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2008-06-18 00:27:16 補充：
The reaction is not displacement, because displacement reaction involves a more reactive metals and the solution of the salt of a less reactive metals (e.g. zinc and copper(II) sulphate solution).

2008-06-18 00:27:23 補充：
The reaction is precipitation. Calcium chloride solution consists of calcium and chloride ions, while potassium carbonate consists of potassium and carbonate ions. Calcium and carbonate ions combine to form calcium carbonate precipitate, because calcium carbonate is insoluble in water.

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