Question #99100

1 Answer
Jan 14, 2017

Besides being an example of double replacement, this is a precipitation reaction, as calcium carbonate is not soluble in water, while the other compounds mentioned are.
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Explanation:

The balanced equation is this:

(NH4)2CO3(aq)+CaSO4(aq)(NH4)2SO4(aq)+CaCO3(s)

The net ionic equation is

Ca2++CO23CaCO3(s)

The spectator ions are NH+4 and SO24

This reaction occurs because the combination of calcium ion and carbonate ion results in a compound of low solubility in water (calcium carbonate).