Question 2:

Give an example of a double displacement reaction other than the one given in

Activity 1.10.

Answer

Sodium carbonate reacts with calcium chloride to form calcium carbonate and sodium

chloride.

Na₂CO_3(aq)    +    CaCl_2(aq)    →    CaCO_3(s)    +   2NaCl_(aq)

Sodium               Calcium             Calcium          Sodium

Carbonate          chloride              carbonate       chloride

In this reaction, sodium carbonate and calcium chloride exchange ions to form two new

compounds. Hence, it is a double displacement reaction.

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