Faraday Constant

What is Faraday Constant? In Physics as well as in Chemistry, Faraday represents the magnitude of electric charge per mole of the electron. Faraday is equivalent to Faraday constant. Denoted by the symbol F. The constant was named after Michael Faraday. It has got plenty of applications in electrolysis.

Faraday Constant Value

It has currently universally accepted value

Faraday constant (F) =96485.33289(59) C mol−1

Other Common Units

Value of Faraday constant can be expressed using other units as follows,

Equivalent value

Units

96485

Joule per volt gram equivalent

23.061

kcal per volt gram equivalent

26.801

A·h/mol

Faraday Constant Formula

This constant can be expressed in terms of two other physical constants as-

F = eNA

Where,

  • e is the charge of electron in coulombs e = 1.60217662×10−19 C
  • NA is the Avogadro constant. NA = 6.022141×1023 mol−1.

Applications

One of the most common uses of Faraday constant is in electrolysis. dividing the amount of charge in coulombs by the Faraday constant gives the amount in moles of elements that have been oxidised.

Calculation

Researches have been carrying out till today to increase the accuracy of Faraday constant. Although it was initially determined using Faraday’s law of electrolysis. In general, for an electrochemical reaction, a measured value of current is made to pass for a certain time and value of F was calculated by measuring the amount of silver deposited.

Hope you have understood about Faraday constant, How it is calculated, Its physical properties like – Value, Formula along with terms, units and values, Applications in electrolysis.

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