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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.
The equivalent masses of acids, bases, and salts are calculated as follows: Equivalent mass of an acid = molecular mass of the acid/basicity. Equivalent mass of a base = molecular mass of the base/acidity. Equivalent mass of a salt = molecular mass of the salt/total positive valency of metal atoms.
8 mar 2020 · The general number of equivalents formula is. E = MW/charge number. Where MW is the molecular weight of the compound and charge number is the number of proton- or hydroxide-equivalents the compound contains. Examples with different acids and bases help illustrate how this works in practice.
Definitions of Equivalent Weight ( Acid-Base Context ) The weight of a compound that contains ONE EQUIVALENT of a proton (for acid) or ONE EQUIVALENT of an hydroxide (for base). Examples: (1) H 2 SO 4 + 2OH - = 2H 2 O + SO 42-. Molecular weight of sulfuric acid (H 2 SO 4) = 98.07 g/mol.
The formula for determining a substance’s equivalent mass depends on the class of the compound in question. It is easy to find the equivalent mass for oxides, for example: divide the molar mass of the compound by the valence of the non-oxygen element multiplied by its number of atoms.
24 sty 2016 · The formula you were talking about gives the equivalent weight of an element (can be extended to be used with ions). Equivalent weight = (Atomic mass)/(Valency) This could be intuitive and obvious for some.
3 paź 2024 · The equivalent weight (EW) of a substance can be calculated using the formula: \[ \text{EW} = \frac{\text{MW}}{\Delta E} \] where EW is the equivalent weight, MW is the molecular weight, and ΔE is the number of electrons gained or lost by one molecule.
