Stoichiometry

Review Packet

Objectives:

• Moles, mass, representative particles (atoms, molecules, formula units), molar mass, and Avogadro’s number
• Molarity, preparation of solutions
• The percent composition of an element in a compound
• Balanced chemical equations
• Limiting reactants
• Reactants in solution: given the molarity and the volume of the reactants, calculate the amount of product produced or the amount of reactant required to react
• The percent yield of a reaction

Chapters 2, 3

Equations (from yellow sheet)

n = m/M

Avogadro’s number = 6.022 x 10²³ [molecules] mol^-1

Notes

I. Stoichiometry

A. Moles

1. Converting moles to grams

2. Converting grams to moles

3. Moles to particles and vice versa

B. Molar Mass

C. Molarity

D. Percent Composition

E. Determination of empirical formula by combustion analysis

F. Conversions involved in stoichimetric calculations

G. Solution stoichiometry

H. Limiting reactant

I. Percent yield