Search results
In chemistry, equivalent weight (also known as gram equivalent[1] or equivalent mass) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance.
29 lip 2021 · Gram equivalent mass is defined as the mass of an element (compound or ion) that combines or displaces 1.008 g hydrogen or 8 g oxygen or 35.5 g chlorine.
Equivalent weight is the mass of a substance that reacts with or replaces one mole of hydrogen ions or electrons. It is expressed in grams per equivalent. On the other hand, gram equivalent is the mass of a substance that reacts with or replaces one gram equivalent of hydrogen ions or electrons.
\[\text{Equivalent Mass}=\dfrac{\text{Mass of the Metal}\times 8}{\text{Mass of Oxygen in the Oxide}}.\] The mass of a metal in its oxide is \(75\%\) of the mass of the whole compound. Calculate its equivalent mass.
A gram equivalent (geq) is the number of grams of substance present divided by its equivalent weight. It can also be expressed as the number of charge elements contained times the number of moles n.
Gram equivalent weight is determined by dividing the molar mass of a substance by its valence, which reflects the number of hydrogen ions or electrons involved in a reaction. On the other hand, gram molecular weight is calculated by summing up the atomic masses of all the atoms in a molecule.
The equivalent weight of an element is its gram atomic weight divided by its valence (combining power). Some equivalent weights are: silver (Ag), 107.868 grams (g); magnesium (Mg), 24.312/2 g; aluminum (Al), 26.9815/3 g; and sulfur (S, in forming a sulfide), 32.064/2 g.
