Electrolysis of an nacl solution with a current of 2.00 a for a period of 200 s produced 59.6 ml of cl2 at 650 mm pressure and 27° c. calculate the value of the faraday from these data.

0.00415F

Explanation:

Given parameters:

Current in the solution = 2A

Time = 200s

Volume of chlorine gas = 59.6mL

Pressure = 650mmHg

Temperature = 27° C

Unknown parameter:

The faraday which is the quantity of electricity used = ?

Solution:

The quantity of electricity used in the reaction is derived from the product of the current passed through the solution and time duration. It is expressed in  coulombs.

      Q = I x t

where I is the current

           t is the time

       Q = 2 x 200 = 400coulombs

One faraday is the quantity of electricity produced by one mole of electrons:

      1Faraday = 96500 coulombs

   Therefore 400coulombs gives = 0.00415F

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !