Equivalent (chemistry)
The Equivalent (symbol: Eq), sometimes termed the molar equivalent, is a unit of electrical charge used in chemistry and the biological sciences. It could be converted to coulombs (symbol C) using Faraday's constant F in C/mol, where 1 Eq = F C.
The equivalent of a substance is the amount of the substance (in moles) multiplied by its Valence.
The equivalent could be also formally defined through the amount of substance which will either:
Given this definition, an equivalent may also be defined as the number of moles of a given ion in a solution. So, if 1 mol of NaCl and 1 mol of CaCl2 are dissolved in a solution, there is 1 Eq Na, 2 Eq Ca, and 3 Eq Cl in that solution.
The mass of one equivalent of a substance is called its equivalent weight.
A historical definition, used especially for the chemical elements, describes an equivalent as the amount of a substance that will react with 1 g (0.035 oz) of hydrogen, or with 8 g (0.28 oz) of oxygen, or with 35.5 g (1.25 oz) of chlorine, or displaces any of the three.
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Jo Bandhe Hai Pasand Mujhako
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