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Which of the following statement is correct about Faraday’s Laws of Electrolysis? First Law: The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution or melt). Second Law: The amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional to their chemical equivalent weights (Atomic Mass of Metal ÷ number of electrons required to reduce the cation).

Which of the following statement is correct about Faraday’s Laws of Electrolysis? First Law: The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution or melt). Second Law: The amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional to their chemical equivalent weights (Atomic Mass of Metal ÷ number of electrons required to reduce the cation). Correct Answer Both are correct

The correct answer 3 i.e. Both are correct.

Quantitative aspects of electrolysis:

  • Michael Faraday was the first scientist who described the quantitative aspects of electrolysis. 
  • Faraday’s Laws of Electrolysis:
  • ​After his extensive investigations on electrolysis of solutions and melts of electrolytes, Faraday published his results during 1833-34 in the form of the following well known Faraday’s two laws of electrolysis:
    • First Law: The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution or melt).
    • Second Law: The amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional to their chemical equivalent weights (Atomic Mass of Metal ÷ number of electrons required to reduce the cation).
  • There were no constant current sources available during Faraday’s times. 
  • The general practice was to put a coulometer (a standard electrolytic cell) for determining the quantity of electricity passed from the amount of metal (generally silver or copper) deposited or consumed. 
  • However, coulometers are now obsolete and we now have constant current (I) sources available and the quantity of electricity Q, passed is given by
             Q = It
    Q is in coloumb when I is in ampere and t is in second.
  • The amount of electricity (or charge) required for oxidation or reduction depends on the stoichiometry of the electrode reaction. 
    • For example, in the reaction:
            Ag +(aq) + e– → Ag(s) 
      One mole of the electron is required for the reduction of one mole of silver ions.

Related Questions

Which statement is correct about Faraday’s Laws of Electrolysis? Statement 1: After his extensive investigations on electrolysis of solutions and melts of electrolytes, Faraday published his results during 1833-34 in the form of well known Faraday’s two laws of electrolysis. Statement 2: He used a coulometer (a standard electrolytic cell) for determining the quantity of electricity passed from the amount of metal (generally silver or copper) deposited or consumed. 
Molten steel is kept in a ladle. Due in natural convection. mixing occurs inside the melt. A 1cm diameter sphere is held in the centre of the melt where the steel flows upward. so as to measure the force exerted by the melt on the sphere. The force. F exerted by the melt on the sphere is given by $$F = f\left( {\frac{\pi }{8}} \right).\left( {\frac{{{\mu ^2}}}{8}} \right){\left( {\operatorname{Re} } \right)^2}.$$
Data: Density of liquid steels
= 7100 kg. m-3
Viscosity of liquid steel
= 6.5 × 10-3 kg. m-1. s-1
Reynolds number (Re) of the melt
= 5 × 103
Friction factor (f) = 0.3
The velocity of melt (m.s-1) in the central portion of the ladle would be
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