Home
Class 12
CHEMISTRY
A solution of Ni(NO3)2 is electrolysed b...

A solution of `Ni(NO_3)_2` is electrolysed between platinam electrodes using a current of `5 am^-` peres for 20 minutes. What mass of `N i` is `d e` posited at the cathode?

Text Solution

Verified by Experts

Atomic mass of Ni=58.7 .time =20 min =20 xx 60=1200 sec . endaligned Quantity of electricity passed `=1 xx t=5 xx 1200` `therefore=6000 C` Ni (NOy, will yield Nis- ions in the solution `dotN i^2 *+2 e^- Ni_i` Thas, `2 ~F`, ie. `2 xx 96.500 C` deposit `Ni=1`, mole `` because=58.7 ~g . ...
Promotional Banner

Topper's Solved these Questions

  • COORDINATION COMPOUNDS

    V PUBLICATION|Exercise QUESTION BANK|113 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    V PUBLICATION|Exercise QUESTION BANK|139 Videos

Similar Questions

Explore conceptually related problems

Copper sulphate solution (250 mL) was electrolysed using a platinum anode and a copper cathode. A constant current of 2 mA was passed for 16 minutes. It was found that after electrolysis, the absorbance of the solution was reduced to 50 % of its original value. Calculate the concentration of copper sulphate in the solution to begin with.

Three electrolytic cells A, B, C containing solutions of ZnSO_4, AgNO_3 and CuSO_4 , respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited?

The following galvanic cell Zn|Zn(NO_3)_2(aq)||Cu(NO_3)_2(aq)|Cu Anode (100mL,1M)(100mL,1M) cathode was operated as an electrolysis cell as Cu as the anode and Zn as the cathode. A current of 0.48 ampere was passed for 10 hours and then the cell was allowed to function to galvanic cell.What would be the emf of the cell at 25^@C Assume that the only electrode reactions occurring were those involving Cu//Cu^(2+) and Zn//Zn^(2+) (E_(Cu^(2+),Cu)^@=+0.34V, E_(Zn^(2+),Zn)^@=-0.76V)

4 ampere current was passed through an aqueous solution of an unknown salt of Pd for 1 hour, 3.977 g of P d^ n+ was deposited at cathode. Find n (mass of P d=106.4)

Consider the electrochemical cell represented by Mg|Mg^(2+) ||Fe^(3+)|Fe^(2+) If 150mA is to be drawn from this cell for a period of 20 minutes, what is the minimum mass for the magnesium electrode?

An aqueous solution containing 1M each of Au^(3+), Cu^(2+), Ag^(+), Li^(+) is being electrolysed by using inert electrodes. The value of standard potentials are E_(Ag^(+)//Ag)^(@)= 0.80V, E_(Cu^(2+)//Cu)^(@) = 0.34V, and E_(Au^(3+)//Au)^(@) = 1.50 V , E_(Li^(+)//Li)^(@)= -3.03V , With increasing voltage, the sequence of deposition of metals on the cathode will be

In a fuel cell, hydrogen and oxygen react to produce electricity. In the process hydrogen is oxidised at the anode and oxygen at the cathode. If 67.2 L of H_2 , at STP react in 15 minutes, what is the average current produced. If the entire current is used for electro deposition of copper from copper (II) solution, how many grams of copper will be deposited?

V PUBLICATION-ELECTROCHEMISTRY-QUESTION BANK
  1. How much electricity in terms of Faraday is required to produce i. 20....

    Text Solution

    |

  2. How much electricity is required in coulomb for the oxidation of i. 1 ...

    Text Solution

    |

  3. A solution of Ni(NO3)2 is electrolysed between platinam electrodes usi...

    Text Solution

    |

  4. Three electrolytic cells A, B, C containing solutions of ZnSO4, AgNO3 ...

    Text Solution

    |

  5. Using the standard electrode potentials given : in Table 3.1( book), p...

    Text Solution

    |

  6. Predict the products of electrolysis in each of the following: ¡. An a...

    Text Solution

    |

  7. "Even combustion of fuels can be used to generate electricity". Commen...

    Text Solution

    |

  8. How will you show that Faraday's second law of electrolysis is simply ...

    Text Solution

    |

  9. Name, the products of electrolysis of the following a) if Copper sulph...

    Text Solution

    |

  10. A part of electrodes series is given. Observe the values and fill up ...

    Text Solution

    |

  11. A. 0.05 M NaOH solution offered, a.resistance of 31.6 ohm in a conduc...

    Text Solution

    |

  12. Calculate the single electrode potential at 298 K of the Cu ^2 + /...

    Text Solution

    |

  13. The molar conductances of HCl, NaCl and CH 3 ​ COONa are 426ohm^-1 ...

    Text Solution

    |

  14. The measured emf at 25^circ C for the cell reaction. Zn(s)+Cu^2 *(1.0 ...

    Text Solution

    |

  15. NH4OH is a weak electrölyte whose equivalent conductance can be found ...

    Text Solution

    |

  16. 10. A student 'tried to find out the standard reduction'potentials of ...

    Text Solution

    |

  17. Iron metal is largely used for making ships. ln the sea, ship is in co...

    Text Solution

    |

  18. In Appollo space programme the fuel cells are used not only for electr...

    Text Solution

    |

  19. The cell reaction for a galvanic cellIs Ni(s)+2Ag(aq)^(+) rarr Ni(aq)...

    Text Solution

    |

  20. How much substance is deposited by passing 1 coulomb of electricity?

    Text Solution

    |