Faraday's First Law of Electrolysis - Electrochemistry Video Lecture | Physical Chemistry

sundae's first law of electrolysis
faraday on the basis of experimental
calculations gave two important laws
namely the first law of electrolysis and
the second law of electrolysis let's now
discuss the first law of electrolysis
first law of electrolysis it states that
the mass of a substance deposited or
liberated on an electrode during
electrolysis is proportional to the
total quantity of electric charge
passing through the electrolyte that is
n is statically proportional to Q where
m is the mass of the substance liberated
or deposited on an electrode and Q is
the total quantity of charge passing
through the electrolyte the mathematical
representation of this law can be
written as M is equal to set Q where Z
is the constant of proportionality
called the electrochemical equivalent of
a substance ECE
or M is equal to said I T
verification of first law of
electrolysis take three copper Volta
meters find the mass of the cathodes
arrange the three water meters as shown
here
switch on the circuit
click on the voltmeter to observe the
deflection in the multimeter
what do you infer
we observe that the current passing
through the water meter a divides
equally at the junction and flows into
the water meters b and c now switch off
the circuit after 5 minutes
remove the cathodes and find the mass of
each cathode
what do you observe the mass deposited
on the cathode of the water meter a is
twice the mass deposited on the cathodes
of ultimate as B and C that is the mass
deposited on each cathode is
proportional to the amount of current
passing through it this verifies
Faraday's first law of electrolysis