Home
Class 12
CHEMISTRY
A aqueous solution of NaCl on electrolys...

A aqueous solution of `NaCl` on electrolysis gives `H_(2)(g), Cl_(2)(g)`, and `NaOH` according to the reaction :
`2Cl^(-)(aq)+2H_(2)Orarr 2OH^(-)(aq)+H_(2)(g)+Cl_(2)(g)`
A direct current of 25A with `62%` efficiency is passed through 20 L NaCl solution (`20%` by weight). (2) How long will it take to form 1kg `Cl_(2)`?

Text Solution

Verified by Experts

According to Faraday's first law, `W=ZIt" …(1)"`
Current efficiency `=62%=0.62`
Effective electric current (I) `=25xx0.62A`
Mass of `Cl_(2)=10^(3)g therefore" Z for "Cl_(2)=("eq. weight")/(96500)=(35.5)/(96500)`
`"Substituting in equation (1), "10^(3)=(35.5)/(96500)xx25xx0.62xxt`
`"or, "t=(10^(3)xx96500)/(35.5xx25xx0.62)="175375.83 sec = 48.71 hrs"`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise ENTRANCE QUESTION BANK (WBJEE)|14 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise ENTRANCE QUESTION BANK (JEE-MAIN)|10 Videos

  • ELECTROCHEMISTRY

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS|30 Videos

  • D - AND F - BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTICE SET 8 (Answer the following questions)|10 Videos

  • ENVIRONMENTAL CHEMISTRY

    CHHAYA PUBLICATION|Exercise PRACTICE SET 14(Answer the following questions)|6 Videos

Similar Questions

Explore conceptually related problems

A aqueous solution of NaCl on electrolysis gives H_(2)(g), Cl_(2)(g) , and NaOH according to the reaction : 2Cl^(-)(aq)+2H_(2)Orarr 2OH^(-)(aq)+H_(2)(g)+Cl_(2)(g) A direct current of 25A with 62% efficiency is passed through 20 L NaCl solution ( 20% by weight). (1) Give the reaction occurring at anode and cathode.

A aqueous solution of NaCl on electrolysis gives H_(2)(g), Cl_(2)(g) , and NaOH according to the reaction : 2Cl^(-)(aq)+2H_(2)Orarr 2OH^(-)(aq)+H_(2)(g)+Cl_(2)(g) A direct current of 25A with 62% efficiency is passed through 20 L NaCl solution ( 20% by weight). (3) What will be the molarity of the solution with respect to OH^(-) ? (Assume no loss due to evaporation)

Knowledge Check

  • In the reaction, H_2(g) + Cl_2(g) iff 2HCl(g)

    A
    `K_p ne K_c`
    B
    `K_p = K_c`
    C
    `K_p gt K_c`
    D
    `K_p lt K_c`

  • PCl_(5) (g) to PCl_(3) (g) + Cl_(2) (g) , in this chemical reaction -

    A
    `Delta H = Delta E `
    B
    `Delta H gt Delta E`
    C
    `Delta H lt Delta E`
    D
    none of the above

    • Similar Questions

    Explore conceptually related problems

    On electrolysis of aq NaCl solution , H_(2)(g) , Cl_(2)(g) and NaOH are produced : 2Cl^(-)(aq)+2H_(2)Orarr2OH^(-)(aq)+H_(2)(g)+Cl_(2)(g) 62 % efficient 25 A electricity is passed through 20L 20 % NaCl solution . ( i ) Write the electrode reactions ( ii ) How much time will it take to produce 1 kg Cl_(2) ( iii ) What will be the molarity at that time with respect to OH^(-) ? ( suppose no volume change occurs during electrolysis )

    Complete the following reaction : Cl_(2)+H_(2)Oto

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

    Write the expression of K_(c) for the reactions: Cl_(2)(g)+2Br^(-)(aq)hArrBr_(2)(l)+2Cl^(-)(aq) .

    Write the expressions of K_(c) and K_(p) for the reaction: 4HCl(g)+O_(2)(g)hArr2Cl_(2)(g)+2H_(2)O(g) .

    Which of the following relations regarding the reaction : Br_(2) (l) + Cl_(2) (g) to 2 BrCl(g) is correct -

    Home
    Profile