# In which of the following solution metallic ion can be displaced by aluminium : (i)CuSO4(ii)NaCL(CaCl2(IV)MgSO4 ?

Oct 5, 2016

The ions present in solutions are

$C {u}^{2 +} , N {a}^{+} , C {a}^{2 +} , M {g}^{2 +}$

The metal dipped in solutions is $A l$

As per the electrochmical series the order of reducing strength of metal is

$C a > N a > M g > A l > C u$

So Al can only reduce $C {u}^{2 +}$ ion from its solution.i.e. Cu only will be displaced from $C u S {O}_{4}$ solution when Al metal is dipped in it.