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The equivalent weight of an element is the mass of a mole of the element divided by the element's usual valence. That is, in grams, the atomic weight of the element divided by the usual valence. [2] For example, the equivalent weight of oxygen is 16.0/2 = 8.0 grams. ).
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.
19 kwi 2024 · Equivalent weight is the mass of a substance that combines with or is equivalent to eight grams of oxygen or one gram of hydrogen in a chemical reaction. How is equivalent weight calculated? It is calculated by dividing the molecular weight by the valence (number of electrons transferred per molecule in the reaction).
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. Consider the following reaction: Zn + H 2 SO 4 → ZnSO 4 + H 2. In this reaction 1 mole of zinc (i.e. 65.38 g) displaces one mole of hydrogen molecule (2.016 g).
Equivalent weight is used in the calculation of normality. The normality of a solution is defined as the number of gram equivalents of the solute present per litre of the solution. It is represented by the symbol, N. Normality = gram equivalent of the solute/volume of the solution in litres.
The formula to calculate the equivalent mass of an element is given by \[\text{Equivalent Mass}=\dfrac{\text{Atomic Mass}}{\text{Valency}}.\] Sometimes if we don't know the valency of the atom, we cannot find the equivalent mass.
The formula to calculate equivalent weight is: Equivalent Weight (EW) = Molecular Weight (MW) / ΔE. In this formula, the molecular weight is expressed in grams per mole, and ΔE represents the number of moles of reactive species per mole of the substance.
