English

State the First Law of Electrolysis - Chemistry

Advertisements
Advertisements

Question

State the first law of electrolysis

Short Note

Solution 1

First law : It states that the amount of substance that undergoes oxidation or reduction at each electrode during electrolysis is directly proportional to the amount of electricity that passes through the cell.

shaalaa.com

Solution 2

It is one of the primary laws of electrolysis. It states, during electrolysis, the amount of chemical reaction which occurs at any electrode under the influence of electrical energy is proportional to the quantity of electricity passed through the electrolyte.

shaalaa.com
  Is there an error in this question or solution?
2013-2014 (March)

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

96500 coulombs correspond to the charge on how many electrons?


Write any four applications of electrochemical series


Number of faradays of electricity required to liberate 12 g of hydrogen is:


Using the E° values of A and B, predict which is better for coating the surface of iron [E°(Fe+2/Fe) = -0.44V] to prevent corrosion and why?

Given: E° (A+2/A)=-2.37 V: E°(B+2/B)= -0.14V


Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution:

Na+(aq) + e ⟶ Na (s) E0 =  2.71 V

H+(aq) + e ⟶ `1/2`  H2 (g) E0 = 0.00 V

On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why?


If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?


Consider the reaction: \[\ce{Cr2O^{2-}_7 + 14H^+ + 6e^- -> 2Cr^{3+} + 7H2O}\]

What is the quantity of electricity in coulombs needed to reduce 1 mol of  \[\ce{Cr2O^{2-}_7}\]?


A solution of \[\ce{Ni(NO3)2}\] is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of \[\ce{Ni}\] is deposited at the cathode?


Write any two uses of H2SO4


Draw neat labelled diagram of electrolytic refining of blister copper


State second law of electrolysis


Explain Faraday’s second law of electrolysis


How much quantity of electricity in coulomb is required to deposit 1.346 × 10-3 kg of Ag in 3.5 minutes from AgNO3 solution?
( Given: Molar mass of Ag is 108 × 10-3 kg mol-1 )


Solve the following question.
A steady current of 2 amperes was passed through two electrolytic cells X and Y connected in series containing electrolytes FeSO4 and ZnSO4 until 2.8 g of Fe deposited at the cathode of cell X. How long did the current flow? Calculate the mass of Zn deposited at the cathode of cell Y.
(Molar mass : Fe = 56 g mol–1, Zn = 65.3 g mol–1, 1F = 96500 C mol–1)


According to Faraday’s First Law of Electrolysis, the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the ____________.


In the electrolysis of aqueous sodium chloride solution which of the half cell reaction will occur at anode?


What will happen during the electrolysis of aqueous solution of \[\ce{CuSO4}\] by using platinum electrodes?

(i) Copper will deposit at cathode.

(ii) Copper will deposit at anode.

(iii) Oxygen will be released at anode.

(iv) Copper will dissolve at anode.


Aqueous copper sulphate solution and aqueous silver nitrate solution 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.


Consider the figure and answer the following question.

Cell ‘A’ has ECell = 2V and Cell ‘B’ has ECell = 1.1V which of the two cells ‘A’ or ‘B’ will act as an electrolytic cell. Which electrode reactions will occur in this cell?


Time Required to deposite one millimole of aluminium metal by the passage of 9.65 ampere through aqueous solution of aluminium is


The quantity of electricity needed to separately electrolyse 1 M solution of ZnSO4, AlCl3, and AgNO3 completely is in the ratio of ______.


What is the quantity of electricity in Coulombs required to produce 4.8 g of Mg from molten MgCl2? How much Ca will be produced if the same amount of electricity was passed through molten CaCl2? (Atomic mass of Mg = 24 u, atomic mass of Ca = 40 u).


On passing electricity through nitrobenzene solution, it is converted into azobenzene. The mass of azobenzene is ______ mg, if the same quantity of electricity produces oxygen just sufficient to burn 96 mg of fullerene (C60


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×