IB SL Chemistry - Stoichiometry

• Stoichiometry: Utilize mol:mol ratios for problem-solving.
• Combustion analysis: Burn hydrocarbons in oxygen; CuO oxidizes unreacted CO and C to produce CO2.
• Combustion analysis: Absorb H2O and CO2 separately for % composition calculation of the original hydrocarbon.
• Hydrate analysis: Ionic hydrates have water in the crystal structure; anhydrous lacks water.
• Hydrate analysis: Heat converts hydrate to anhydrous form; mass change determines original hydrate's water molecules.
• Stoichiometry: Avoid molar mass multiplication by coefficients.
• Empirical formula: Simplest whole number ratio of atoms present in a compound.