Sub-topic #2: Conversion of Mole to Mass

• Molecular Weight (MW) – sum of the atomic

  weights of the atoms that make up a compound.
• It is used as a conversion factor when converting

  mole of a solute to the mass unit.
• Formula Weight (FW) – provides a more accurate

  description for substances that don’t exist as

  molecules but exist as ionic compounds.
• MW is molarity
• FW is formality
• Molar Analytical Concentration or Analytical

  Concentration

  • Gives the total number of moles of a solute in one liter of the solution.
• Molar Analytical Concentration or Analytical

  Concentration

  • It specifies a recipe by which the solution can be prepared regardless of what might happen to the solute during the solution process.
• Molar Equilibrium Concentration/Molar Concentration [M]

  • For compounds that do not ionize: the major concentration is the same as the analytical concentration.
• Molar Equilibrium Concentration/Molar Concentration [M]

  • For ionic substances: strong base or a strong acid, such as HCl, a 0.1 M analytical concentration will give [HCl] = 0 while [H+] and [Cl-] = 0.1.