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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.
Equivalent weights may be calculated from molar masses if the chemistry of the substance is well known: sulfuric acid has a molar mass of 98.078(5) g mol −1 , and supplies two moles of hydrogen ions per mole of sulfuric acid, so its equivalent weight is 98.078(5) g mol −1 /2 eq mol −1 = 49.039(3) g eq −1 .
H2SO4 + 2OH- → 2H2O + SO42-. The equivalent weight of the acid can be determined by determining the individual molecular weight of each of the elements from the periodic table and firstly adding them together. This will give us the molecular weight of the acid. 2 (1) + (32) + 4 (16) = 98.0.
Formula and Molecular Weights. The formula weight of a substance is the sum of the atomic weights of each atom in its chemical formula. For example, water (H 2 O) has a formula weight of: \[2\times(1.0079\;amu) + 1 \times (15.9994 \;amu) = 18.01528 \;amu \nonumber \]
21 lis 2023 · The Equivalent Weight (EW) formula is: EW = Molar Mass / n number of equivalents. Where "n" number of equivalents is the quantity of charge depending on the substance. If the substance...
24 sty 2016 · The formula for equivalent weight should be simple from this point. Equivalent weight=Molar weight/n-factor
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.
