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Stoichiometry

Stoichiometry. What Is It?. Branch of chemistry that shows the relationships among reactants and products in a chemical reaction Equations must be balanced correctly. Mole Ratio. Conversion factor that relates the number of moles of any two substances 2 Al 2 O 3  4Al + 3O 2.

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Stoichiometry

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  1. Stoichiometry

  2. What Is It? • Branch of chemistry that shows the relationships among reactants and products in a chemical reaction • Equations must be balanced correctly

  3. Mole Ratio • Conversion factor that relates the number of moles of any two substances 2 Al2O3 4Al + 3O2

  4. Mole to Mole Problems 2 Al2O3 4Al + 3O2 How many moles of Al are produced by decomposing 2.5 moles of Al2O3 decomposing? If .500 moles of Al is produced by this reaction, how many moles of O2 are produced? If 28.5 moles of O2 was formed, how many moles of Al2O3 did you start with?

  5. Mole to Mass Problems • Two steps • 2H2 + O2 2H2O • How many grams of water are produced from 6.5 moles oxygen? • 6CO2 + 6H2O  C6H12O6 + 6O2 • How many grams of sugar are produced when 3.0 moles of carbon dioxide reacts? • How many grams of water are needed to react with 3.0 mole of carbon dioxide?

  6. Mass to Mole Problems • Two steps • H2 + Cl2 2HCl • How many moles of HCL are produced from 12.5 g of hydrogen gas? • 2Na + Cl2  2NaCl • How many moles of NaCl will be produced from 100 g of chlorine gas? • How many moles of Na will be needed to combine with 12.0 g of chlorine gas?

  7. Mass to Mass Problems • Three steps • 2 Al2O3 4Al + 3O2 • How many grams of oxygen gas are produced from 58.6 g of aluminum oxide decomposing? • If 12.5g of Al was produced in a decomposition, how many grams of oxygen gas was produced?

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