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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.
Equivalent weight focuses on the reactive capacity of a substance, while gram equivalent emphasizes the weight of a substance that is chemically equivalent to one mole of hydrogen ions or hydroxide ions.
24 sty 2016 · Equivalent weight is the (mass of) number of moles of one reactant in a balanced reaction (or product) divided by the number of moles of another. In the simple case where we have two reactants which combine 1:1, then the mass of 1 mole of either is its equivalent weight.
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.
Gram equivalent weight is expressed in grams per mole (g/mol), similar to gram molecular weight. However, gram equivalent weight is often represented as grams per equivalent (g/eq) to emphasize its role in reactions involving equivalents of hydrogen ions or electrons.
29 lip 2021 · Definition: 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.
24 wrz 2024 · The mass of an acid or a base that will release or neutralize one gram molecule (mole) of hydrogen ion. A 1-mole solution of H2SO4 contains 2 gram equivalents. A thousandth of a gram equivalent weight is a millequivalent. See normal solution.
