CHAPTER 24 : CHEMICAL EFFECTS OF ELECTRIC CURRENT
When electric current flows through water (acidulated for better
conduction ) then Hydrogen gas is found to be liberated at the cathode,
while oxygen gas is liberated at the anode. This process of separating
compounds into ions is called electrolysis. Solutions which
are decomposed due to current passed through them are called electrolytes.
24.1 Faraday's Laws of Electrolysis
The amount (mass ) of a substance in an electrolyte liberated in electrolysis is proportional to the
charge passed through the electrolyte.
i.e, m µ Q
or m = e Q .........(1)
where e is called e.c.e. i.e. electro chemical equivalent of the substance.
If i.e. the same charge is passed through a number of electrolytes, then the mass of the
substances liberated by electrolysis are in the same ratios as their chemical equivalents.
i.e. m1: m2 : m3 : :
C1 : C2 : C3
where C1 , C2 , C3 are the chemical equivalents.