Question

The electrochemical equivalent can be defined as the mass of the substance in grams produced/consumed at the electrode by one coulomb of charge or by one ampere of current passed for one second.
A.True
B.False

Answer 1

Hint: In this problem we have to say whether the given statement is true or false. The concept of electrochemical equivalent comes from faraday’s first law of electrolysis. The electrochemical equivalent of a substance is defined as the mass of the substance liberated or deposited when one ampere of current is passed through the electrolyte for one second.

Complete step by step answer:
Now we will discuss the given statement in detail.
If W is the mass of the substance liberated at the electrode and Q is the quantity of electricity (in coulombs) passed through the electrolyte then,
$W\alpha Q$
But ${{Q = I \times t}}$
where I is current in ampere, t is time in seconds
$W\alpha I \times t$
$ \Rightarrow W = Z \times I \times t$
(Removing the proportionality sign with a constant Z which is called Electrochemical Equivalent)
$ \Rightarrow Z = \dfrac{W}{{I \times t}}$
$ \Rightarrow Z = \dfrac{\text{mass of the subs}.}{\text{Quantity Of Electricity}}$

Therefore, the given statement is true.

Note:
The process of chemical decomposition of an electrolyte in solution or the fused state by the passage of electric current is known as electrolysis.
The process of electrolysis is carried out in a vessel known as an electrolytic tank. It is made of some insulating material such as glass, stone, etc. Fused electrolyte or an aqueous solution of the electrolyte is taken in the electrolytic tank and two metallic plates are dipped in the poles of a battery. These plates are known as electrodes are then connected with the poles of the battery. The electrode which is connected with the positive pole of the battery is called the anode and the other one electrode that is connected with the negative pole of the battery is called the cathode. The current enters the electrode through the anode and leaves through the cathode.