In the electrolysis of aqueous sodium chlorid | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) In the electrolysis of aqueous sodium chloride $(NaCl)$ with inert electrodes,the solution contains $Na^{+}$,$Cl^{-}$,$H^{+}$,and $OH^{-}$ ions.At

Vedclass · Accepted Answer

$Cl_2$ and $H_2$

Vedclass · Answer

(C) In the electrolysis of aqueous sodium chloride $(NaCl)$ with inert electrodes,the solution contains $Na^{+}$,$Cl^{-}$,$H^{+}$,and $OH^{-}$ ions.At the cathode,the reduction of water is preferred over the reduction of $Na^{+}$ ions because the standard reduction potential of water is higher:$2H_2O(l) + 2e^{-} \rightarrow H_2(g) + 2OH^{-}(aq) ; E^{\circ} = -0.83 \ V$$Na^{+}(aq) + e^{-} \rightarrow Na(s) ; E^{\circ} = -2.71 \ V$Thus,$H_2$ gas is produced at the cathode.At the anode,although the oxidation potential of water is higher,the oxidation of $Cl^{-}$ ions is preferred due to overpotential effects:$2Cl^{-}(aq) \rightarrow Cl_2(g) + 2e^{-} ; E^{\circ} = -1.36 \ V$$2H_2O(l) \rightarrow O_2(g) + 4H^{+}(aq) + 4e^{-} ; E^{\circ} = -1.23 \ V$Therefore,$Cl_2$ gas is produced at the anode.

In the electrolysis of aqueous sodium chloride with inert electrodes,the products obtained at anode and cathode respectively are:

Similar Questions

In the electrolysis of molten $NaCl$,what happens at the anode?

When an aqueous solution of cupric bromide is electrolyzed,the product obtained at the cathode will be:

During the electrolysis of molten sodium chloride,the electrode reactions are:

Oxidation of species depends upon its oxidation potential. An oxidation reaction is possible for the species whose $E^{o}$ value is lower. Which of the following reactions occurs at the anode during the electrolysis of aqueous $NaCl$?

During the electrolysis of water,the volume of $O_2$ gas evolved is $2.24 \ dm^3$. Under the same conditions,what will be the volume of $H_2$ gas in $dm^3$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module