Question.
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
solution:
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
$\mathrm{A}+\mathrm{BX} \longrightarrow \mathrm{AX}+\mathrm{B} ;$ where $\mathrm{A}$ is more reactive
than B
In a double displacement reaction, two atoms or a group of atoms shift places to form new compounds.
$\mathrm{AB}+\mathrm{CD} \longrightarrow \mathrm{AD}+\mathrm{CB}$
For example, Displacement reaction
$\mathrm{CuSO}_{4}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \longrightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$
Double displacement reaction
$\mathrm{Na}_{2} \mathrm{SO}_{4}(\mathrm{aq})+\mathrm{BaCl}_{2}(\mathrm{aq}) \longrightarrow \mathrm{BaSO}_{4}(\mathrm{~s})+2 \mathrm{NaCl}(\mathrm{aq})$
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
$\mathrm{A}+\mathrm{BX} \longrightarrow \mathrm{AX}+\mathrm{B} ;$ where $\mathrm{A}$ is more reactive
than B
In a double displacement reaction, two atoms or a group of atoms shift places to form new compounds.
$\mathrm{AB}+\mathrm{CD} \longrightarrow \mathrm{AD}+\mathrm{CB}$
For example, Displacement reaction
$\mathrm{CuSO}_{4}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \longrightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$
Double displacement reaction
$\mathrm{Na}_{2} \mathrm{SO}_{4}(\mathrm{aq})+\mathrm{BaCl}_{2}(\mathrm{aq}) \longrightarrow \mathrm{BaSO}_{4}(\mathrm{~s})+2 \mathrm{NaCl}(\mathrm{aq})$
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