Question

Identify the balanced single displacement reaction.

Answer 1

Answer: $CuCl_2+Fe\rightarrow Cu +FeCI_2$

Explanation:

This is a single replacement reaction in which iron replaces copper from its salt solution. As iron is more reactive than copper , it easily loses electrons to convert to $Fe^{2+}$ in $FeCl_2$ and $Cu^{2+}$ in $CuCl_2$ accepts electrons to form $Cu$.

The equation is also balanced as equal number of atoms of each element are present on reactant and product side.

1. $CuCl_2+Fe\rightarrow 2Cu +FeCI_2$: The equation is not balanced.

2. $PbCl_4+2Ca(OH)_2\rightarrow 2CaCl_2+Pb(OH)_4$: This is a double displacement reaction and is balanced.

4.  $PbCl_4+2Ca(OH)_2\rightarrow 2CaCl_2+4Pb(OH)_4$: This is a double displacement reaction and is not balanced.

Answer 2

CuCl2 + Fe ⟶ Cu + FeCI2