1) Percentage Yeild

• Atoms are never lost or gained in a chemical reaction.
• However, it is not always possible to obtain the calculated amount of product:

  • If the reaction is reversible, it might not go to completion.
  • Some product could be lost when it is separated from the reaction mixture.
  • Some of the reactants may react in different ways to the expected reaction. The amount of product obtained is called the yield.
• percentage yield= yield from reaction/maximum theoretical yield × 100