The Electrochemical equivalent, sometimes abbreviated Eq or Z, of a

chemical element A chemical element is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler sub ...

is the mass of that element (in

gram The gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one one thousandth of a kilogram. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to th ...

s) transported by 1 coulomb of electric charge. The electrochemical equivalent of an element is measured with a

voltameter A voltameter or coulometer is a scientific instrument used for measuring electric charge (quantity of electricity) through electrolytic action. The SI unit of electric charge is the coulomb. The voltameter should not be confused with a voltmete ...

Definition

The electrochemical equivalent of a substance is the mass of the substance deposited to one of the electrodes when a current of 1 ampere is passed for 1 second, i.e. a quantity of electricity of one coulomb is passed. The formula for finding electrochemical equivalent is as follows: :

Z = M/q

where

M

is the mass of substance and

q

is the charge passed. Since

q=It

, where

I

is the current applied and

t

is time, we also have :

Z=M/It

Eq values of some elements in kg/C

References

Physical chemistry Units of chemical measurement {{chemistry-stub