The electrochemical equivalent (ECE) of a substance is a measure of how much of that substance is deposited or dissolved during electrolysis when a certain amount of electric charge (current) flows through the solution.
In simple terms, it tells us **how much material will be deposited or dissolved** for each unit of electric charge (1 coulomb) passing through an electrolyte. The unit of electrochemical equivalent is grams per coulomb (g/C).
For example:
- If a substance has an ECE of 0.000329 g/C, this means that 0.000329 grams of that substance will be deposited or dissolved for every coulomb of electric charge.
It is directly related to the **Faraday's laws of electrolysis**, which state that the mass of a substance produced by electrolysis is proportional to the amount of electric charge used.