Define molecular weight and equivalent weight

Define molecular weight and equivalent weight:

  • Molecular weight is the mass of one mole of a substance and is expressed in atomic mass units (amu) or grams per mole (g/mol).
  • It is determined by adding up the atomic masses of all the atoms in a molecule.
  • Equivalent weight, on the other hand, is the mass of a substance that reacts with one equivalent of another substance in a chemical reaction. 
  • Equivalent weight is related to the number of moles of a substance that react with one mole of another substance.
MOLECULAR WEIGTH AND EQUIVALENT WEIGTH