Home
Class 12
CHEMISTRY
After electrlysis of NaCI solution with ...

After electrlysis of `NaCI` solution with inert electrodes for a certain period of time `600mL` of the solution was left. Which was found to be `1N` in `NaOH`. During the same time, `31.75 g` of `Cu` deposited in the copper voltameter in series the electrolytic cell. calculate the percentage yield of `NaOH` obtained.

Text Solution

Verified by Experts

The correct Answer is:
`60%`

Equivalent of Cu deposited `=(31.75xx2)/(63.5)=1`
equivalent of NaOH formed `=0.6xx0.6`
`%` yield of `NaOH=60%`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise CBSE Problems|34 Videos
  • ELECTRO CHEMISTRY

    RESONANCE ENGLISH|Exercise PHYSICAL CHEMITRY (ELECTROCHEMISTRY)|53 Videos
  • EQUIVALENT CONCEPT & TITRATIONS

    RESONANCE ENGLISH|Exercise Part -IV|22 Videos

Similar Questions

Explore conceptually related problems

3.0 g of impure Na_2CO_3 is dissolved in water and the solution is made up to 250 mL . To 50 " mL of " this solution, 50 " mL of " 0.1 N HCL is added and the mixture, after shaking well, required 10 " mL of " 0.16 N NaOH solution for cojmplete neutralisation. Calculate the percentage purity of the sample of Na_2CO_3 .

6.5 g mixture of sample containing KOH, NaOH, and Na_2CO_3 was dissolved in H_2O and the volume was made up to 250 mL. 25 " mL of " this solution requires 26.23 " mL of " 0.5 N H_2SO_4 using methyl orange as indicator, and 19.5 " mL of " same H_2SO_4 using phenolphathalein as indicator for complete neutralisation. Calculate the percentage of KOH, NaOH, and Na_2CO_3 in the sample.

(a) The e.m.f. of the following cell at 298 K is 0.1745 V Fe(s) //Fe^(2+) (0.1 M) ////H^(+)(x M)//H_(2)(g) ("1 bar")//Pt (s) Given : E_(Fe^(2+)//Fe)^(0) = - 0.44 V Calculate the H^(+) ions concentration of the solution at the electrode where hydrogen is being produced. (b) Aqueous solution of copper sulphate and silver nitrate are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells. Will the mass of copper and silver deposited on the cathode be same or different? Explain your answer.

1 g of impure Na_(2)CO_(3) is dissolved in water and the solution is made upto 250 mL . To 50 mL of this solution, 50 mL of 0.1 N HCl is added and the mixture after shaking well required 10 mL of 0.16 N NaOH solution for complete neutralization. Calculation percent purity of the sample of Na_(2) CO_(3) .

Perdisulphuric acid (H_2S_2O_8) or Marshall's acid can be prepared by the electrolytic oxidation of H_2SO_4 . AT anode O_2 and H_2 are obtained as side products. After passing a current of 0.5 A for a certain time, the volume of H_2 and O_2 collected was found to be 10.08 and 2.24 L, respectively, at STP. What is the weight of H_2S_2O_8 produced during the same time? Also find the duration of electrolysis (in seconds) assuming 75% efficiency of electronysis. Give all the electronde reaction.

1.5 g of chalk was treated with 10 " mL of " 4 N HCl. The chalk was dissolved and the solution was made to 100 mL. 25 " mL of " this solution required 18.75 " mL of " 0.2 N NaOH solution for comjplete neutralisation. Calculate the percentage of pure CaCO_3 in the sample of chalk.

The reaction An+CuSO_4toZnSO_4 goes completely to the right. In an experiment, 10.0 g of Zn was added to 200 " mL of " CuSO_4 solution. After all the Cu was precipitated, it was found that not all the Zn had dissolved. After filtration, the total weight of the solid at the end of the reaction was 9.810 g. Calculate. (a). The weight of copper deposited and, (b). Molarity of CuSO_4 in the original solution.

In a 500mL of 0.5M CuSO_(4) solution, during electrolysis 1.5xx10^(23) electron were passed using copper electrodes. Assume the volume of solution remains unchanged during electrolysis. Which of the following statements is // are correect? a. At the end of electrolysis, the concentration of the solution is 0.5M . b. 7.9 g of Cu is deposited on the cathode. c. 4 g of Cu is dissolved from the anode. d. 7.9 g of Cu ions are discharged.

1.0 mL of ethyl acetate was added to 25 mL of N//2 HCl, 2 mL of the mixture were withdraw form time to time during the progress of the hydrolyiss of the ester and titrated against standard NaOH solution. The amount of NaOH required for titration at various intervals is given below: The value at oo time was obtained by completing the hydrolyiss on boiling. Show that it is a reaction of the first order and find the average value of the velocity constant.

100mL CuSO_(4)(aq) was electrolyzed using inert electrodes by passing 0.965A till the pH of the resulting solution was 1. The solution after electrolysis was neutralized, treated with excess KI and titrated with 0.04M Na_(2)S_(2)O_(3) . Volume of Na_(2)S_(2)O_(3) required was 35mL . Assuming no volume change during electrolysis, calculate: duration of electrolysis if current efficiency is 80%

RESONANCE ENGLISH-ELECTROCHEMISRY-Advanced Level Problems
  1. 10g fairly concentrated solution of CuSO(4) is electrolyzed using 0.01...

    Text Solution

    |

  2. An electric current is passed through electrolytic cells in series one...

    Text Solution

    |

  3. After electrlysis of NaCI solution with inert electrodes for a certain...

    Text Solution

    |

  4. Same quantity of electricity is being used to liberate iodide (at anod...

    Text Solution

    |

  5. The resistance of two electrolytes X and Y ere found to be 45 and 100 ...

    Text Solution

    |

  6. For 0.0128 N solution fo acetic at 25^(@)C equivalent conductance of t...

    Text Solution

    |

  7. Specific conductance of pure water at 25^(@)C is 0.58 xx 10^(-7) mho c...

    Text Solution

    |

  8. The reduction potential diagram for Cu in acid solution is : Calc...

    Text Solution

    |

  9. For the cellls in opposition, Zn(s)|ZnCl(2)(sol.)|AgCl(s)|Ag|AgCl(s)...

    Text Solution

    |

  10. Prove that Moment of couple= Force times couple arm

    Text Solution

    |

  11. Why zinc coating protects iron more effectively than tin coating ? ...

    Text Solution

    |

  12. For the cell (at 1bar H(2) pressure) Pt|H(2)(g)| HX(m(1)), NaX(m(2)), ...

    Text Solution

    |

  13. Delta(f)H^(Theta) per mole of NH(3)(g). NO(g), and H(2)O(l) are -11.04...

    Text Solution

    |

  14. In a galvanic cell, the half-cell having more standard potential serve...

    Text Solution

    |

  15. At 300 K specific conductivity of ethanol is 4xx10^(-10)mhocm^(-1). Th...

    Text Solution

    |

  16. Metallic sodium cannot be prepared from electrolysis of an aqueous sol...

    Text Solution

    |

  17. The process of AgCN+KCNtoK[Ag(CN)(2)] involves the oxidation of Ag.

    Text Solution

    |

  18. Cations move towards cathode and anions towards anode in both galvanic...

    Text Solution

    |

  19. State the following statement is true or false. A positive half-cel...

    Text Solution

    |

  20. State True or False Metallic anodes more reactive than platinum tend ...

    Text Solution

    |