If zinc pieces are added to yellow FeCl_3 sol | vedclass

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Question

(A) The yellow color of $FeCl_3$ solution is due to the presence of $Fe^{3+}$ ions. When zinc is added to the acidic $FeCl_3$ solution,it reacts with

Vedclass · Accepted Answer

$FeCl_3$ solution is acidic due to hydrolysis and zinc added produces nascent hydrogen causing reduction of $FeCl_3$ to $FeCl_2$

Vedclass · Answer

(A) The yellow color of $FeCl_3$ solution is due to the presence of $Fe^{3+}$ ions. When zinc is added to the acidic $FeCl_3$ solution,it reacts with the $HCl$ produced by the hydrolysis of $FeCl_3$ to generate nascent hydrogen $([H])$. The reaction is: $Zn + 2HCl \rightarrow ZnCl_2 + 2[H]$. This nascent hydrogen reduces the $Fe^{3+}$ ions to $Fe^{2+}$ ions: $2FeCl_3 + 2[H] \rightarrow 2FeCl_2 + 2HCl$. The $Fe^{2+}$ ions are light green in color,which causes the solution to turn from yellow to light green.

If zinc pieces are added to yellow $FeCl_3$ solution,it turns to very light green. It is because

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