Home
Class 12
CHEMISTRY
An aqueous solution of NaCl on electroly...

An aqueous solution of `NaCl` on electrolysis gives `H_(2)(g), Cl_(2)(g),` and `NaOH` accroding to the reaction `:`
`2Cl^(-)(aq)+2H_(2)Orarr2overset(-)(O)H(aq)+H_(2)(g)+Cl_(2)(g)`
A direct current of `25A` with a current efficiency of `62%` is passed through `20L` of `NaCl` solution `(20%` by weight`)`. Write down the reactions taking place at the anode and cathode. How long will it take to produce `1 kg ` of `Cl_(2)`? What will be the molarity of the solution with respect to hydroxide ion ? `(` Assume no loss due to evaporation . `)`

Text Solution

Verified by Experts

(a) At anode `2Cl^(-) to Cl_(2)+2e`
At cathode `2H_(2)O+2e to 2OH^(-) +H_(2)`
(b) `W_(Cl_(2))=("Eit")/(96500) rArr 10^(3)=(35.5 xx 25 xx 62 xx t)/(100 xx 96500)`
`("Current"=25 xx (62)/(100))`
t=175374.83 sec =48.71 hour
(c) Eq. of `OH^(-)` formed `="Eq. of "Cl_(2)=(10^(3))/(35.5)=28.17`
Mole of `OH^(-)` formed =28.17
`[OH^(-)]=(28.17)/(20)=1.408" mol L"^(-1)`
`[OH^(-)]=(28.17)/(20)=1.408" mol L"^(-1)`
`[[OH^(-)]=("Mole")/(L)]`
Promotional Banner

Similar Questions

Explore conceptually related problems

An aqueous solution of NaCl on electrolysis gives H_(2)(g), Cl_(2)(g), and NaOH accroding to the reaction : 2Cl^(c-)(aq)+2H_(2)Orarr2overset(c-)(O)H(aq)+H_(2)(g)+Cl_(2)(g) A direct current of 25A with a current efficiency of 62% is passed through 20L of NaCl solution (20% by weight ) . Write down the reactions taking place at the anode and cathode. How long will it take to produce 1 kg of Cl_(2) ? ( Assume no loss due to evaporation . )

In the reaction : 2Al(s) + 6HCl(aq) rarr 2 Al^(3+)(aq) + 6 Cl^(-)(aq) + 3H_(2)(g)

The mass of Cl_(2) produced when 1A current is passed through NaCl solution for 30 minute is

The electrolysis of a solution resulted in the formation of H_2 (g) at the cathode and Cl_(2) (g) at anode. The solution is :

The reaction that takes place when Cl_(2) gas is passed through conc NaOH solution is

Electrolysis of a solution of MnSO_(4) in aqueous sulphuric acid is a method for the preparation of MnO_(2) as per reaction, Mn_((aq.))^(2+)+2H_(2)O rarr MnO_(2(s))+2H_((aq))^(+)+H_(2(g)) Passing a current of 27 ampere for 24 hour gives one of MnO_(2) . Waht is the value of current efficiency ? Write the reaction taking place at the cathode the anode.

For the reactions, (i) H_(2)(g)+Cl_(2)(g)rarr 2HCl(g)+ xKJ (ii) H_(2)(g)+Cl_(2)(g)rarr 2HCl(l)+ yKJ Which one of the following statement is correct :

For a reaction 2NO(g) +Cl_(2)(g) rarr 2NOCl(g) , when concentration of Cl_(2) is doubled, the rate becomes four times. What is the order of reaction with respect to Cl_(2) ?

Assertion (A): The electrolysis of NaCl solution gives H_(2)(g) at cathode and Cl_(2)(g) at anode. Reason (R) : Cl_(2) has higher oxidation potential than H_(2)O

What is the product of the reaction of H_(2)O_(2) with Cl_(2) ?