8.2 – Stoichiometry Notes
Stoichiometry – involves the mass relationships between reactants and products in a chemical
reaction.
*in stoichiometry problems, you will be converting from a Known Substance, to an Unknown
Substance.
*How do we convert from a known substance, to an unknown substance?
______ Ratio – a conversion factor that relates the amounts, in moles, of any two substances involved
in a chemical reaction.
Ex) for the reaction ___Al2O3 ----------> ___Al + ___O2 what is the mole ratio of:
Al2O3 to Al:
Al2O3 to O2:
Al to O2:
*There are 4 types of Stoichiometry problems you will have to work:
1. Given Mol ----------> Unknown Mol
2. Given Mol ----------> Unknown Mass
3. Given Mass ----------> Unknown Mol
4. Given Mass ----------> Unknown Mass
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