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Question
Consider the reaction:
\[\ce{KBr_{(aq)} + AgNO3_{(aq)} -> KNO3_{(aq)} + AgBr_{(s)}}\]
This is an example of:
Options
decomposition reaction
combination reaction
double displacement reaction
displacement reaction
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Solution
Double displacement reaction
Explanation:
In a double displacement reaction, potassium bromide (KBr) and silver nitrate (AgNO3) exchange their constituent ions (K+, Ag+, Br−, and \[\ce{NO^-_3}\]) to form two entirely new compounds. Because an insoluble solid, silver bromide (AgBr), is produced, it is also specifically classified as a precipitation reaction.
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Give an example of a double displacement reaction other than the one given in the following Activity.
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