Stoichiometry Definition

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Presentation transcript:

Stoichiometry Definition Section 1 Introduction to Stoichiometry Stoichiometry Definition Composition stoichiometry deals with the mass relationships of elements in compounds. Reaction stoichiometry involves the mass relationships between reactants and products in a chemical reaction.

Reaction Stoichiometry Problems Section 1 Introduction to Stoichiometry Reaction Stoichiometry Problems Problem Type 1: Given and unknown quantities are amounts in moles. Amount of given substance (mol) Problem Type 2: Given is an amount in moles and unknown is a mass Amount of given substance (mol) Amount of unknown substance (mol) Amount of unknown substance (mol) Mass of unknown substance (g)

Reaction Stoichiometry Problems, continued Section 1 Introduction to Stoichiometry Reaction Stoichiometry Problems, continued Problem Type 3: Given is a mass and unknown is an amount in moles. Mass of given substance (g) Problem Type 4: Given is a mass and unknown is a mass. Mass of a given substance (g) Amount of given substance (mol) Amount of given substance (mol) Amount of unknown substance (mol) Mass of unknown substance (g) Amount of unknown substance (mol)

Section 1 Introduction to Stoichiometry Mole Ratio A mole ratio is a conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction Example: 2Al2O3(l)  4Al(s) + 3O2(g) Mole Ratios: 2 mol Al2O3 2 mol Al2O3 4 mol Al 4 mol Al 3 mol O2 3 mol O2 , ,

Converting Between Amounts in Moles Section 1 Introduction to Stoichiometry Converting Between Amounts in Moles

Stoichiometry Calculations Section 1 Introduction to Stoichiometry Stoichiometry Calculations