quantitive chemistry

• what is the moles equation?

  moles = mass (g)/mr
• what is the conservation of mass?

  mass of reactants = mass of products
• what is the mass equation?

  mass = moles x mr
• what are the steps to balancing equations with moles?

  1. work out mole of everything
  2. place mole number in front of compounds
  3. simplify numbers if needed
• what is avogadros constant?

  6.02 x 10^23
• how to work out ions (using avogadros constant?


  1. work out moles
  2. multiply number by avogadros constant
• how to calculate reacting masses?

  1. calculate mole (mol=g/mr) of know
  2. ratio
  3. multiply/divide moles in needed
  4. calculate mass (g=mol X Mr) using moles
• what is a limating reactant?

  reactant that is fully used up
• what is the concentration equation?

  concentration = mass/volume
• what is the symbol concentration equation?

  g/dm^3 = g / dm^3
• what are the 2 factors that affect concentration?

  1. if we increase mass of solute but keep volume the same concentration increases
  2. if we increase volume but keep mass of solute the same concentration decreases
• how do you convert cm to dm

  Divide by 1000