Describe the method of obtaining chlorine fro | vedclass

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

Question

(A) The process of obtaining chlorine from brine (sea water) is as follows: $2Cl^-_{(aq)} + 2H_2O_{(l)} \rightarrow 2OH^-_{(aq)} + H_{2(g)} + Cl_{2(g)

Vedclass · Accepted Answer

Anode: $Cl_2$,Cathode: $H_2$ and $NaOH$

Vedclass · Answer

(A) The process of obtaining chlorine from brine (sea water) is as follows: $2Cl^-_{(aq)} + 2H_2O_{(l)} \rightarrow 2OH^-_{(aq)} + H_{2(g)} + Cl_{2(g)}$ For this reaction,$\Delta G^{\ominus} = +422 \ kJ$. Using the formula $\Delta G^{\ominus} = -nFE^{\ominus}$,we calculate $E^{\ominus} = -2.2 \ V$. Thus,by applying an external $EMF$ greater than $2.2 \ V$,the reaction proceeds in the forward direction. However,in electrolysis,additional potential is required to overcome certain hindering reactions. Therefore,chlorine gas is obtained by electrolysis,while $H_2$ and aqueous $NaOH$ are obtained as by-products. Electrolysis of molten $NaCl$ can also be performed,but in that case,$Na$ metal is obtained instead of $NaOH$.

Describe the method of obtaining chlorine from brine (sea water) and write the oxidation-reduction reactions,specifying the products at the anode and cathode.

Similar Questions

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is $:$

During the electrolysis of fused sodium chloride,the anodic reaction is

When a solution of sodium chloride containing ethyl alcohol is electrolysed,it forms:

Which of the following substances is an electrolyte?

Vedclass Test Series

Exam Paper Generator

Online Exam Module