Electrochemical equivalent

In chemistry, the electrochemical equivalent (Eq or Z) of a chemical element is the mass of that element (in grams) transported by a specific quantity of electricity, usually expressed in grams per coulomb of electric charge. The electrochemical equivalent of an element is measured with a voltameter.

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


 * $$Z=M/It$$