Stoichiometry

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# Stoichiometry - PowerPoint PPT Presentation

Stoichiometry. http://www.unit5.org/chemistry/Stoichiometry.html. Table of Contents ‘Stoichiometry’. Balancing Chemical Equations Avogadro’s Number Molar Mass Combustion Reactions Synthesis Reactions Single Replacement Reactions Activity Series Double Replacement Reactions.

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### Stoichiometry

http://www.unit5.org/chemistry/Stoichiometry.html

Balancing Chemical Equations

Molar Mass

Combustion Reactions

Synthesis Reactions

Single Replacement Reactions

Activity Series

Double Replacement Reactions

Mole Island Diagram

Limiting Reactants

Generic Stoichiometry

Air Bag Design

Water from a Camel

Rocket Fuel

Water in Space

Excess Reactant

Classes of Reactions

Stoichiometry
• You should understand
• Moles, mass, representative particles (atoms, molecules, formula

units), molar mass, and Avogadro’s number.

• The percent composition of an element in a compound.
• Balanced chemical equations: for example, for a given mass of a

reactant, calculate the amount of produced.

• Limiting reactants: calculate the amount of product formed when

given the amounts of all the reactants present.

• The percent yield of a reaction.
• Reactions 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.

• Molarity; preparation of solutions.
Some common collections and the numbers of items in them.

Timberlake, Chemistry 7th Edition, page 179

CH4 + 2 O2 CO2 + 2 H2O

Reactants Products

1 C atom 1 C atom

4 H atoms 4 H atoms

4 O atoms 4 O atoms

Timberlake, Chemistry 7th Edition, page 167

Reactants  Products

Unbalanced

Timberlake, Chemistry 7th Edition, page 164

Cl

H

H

H

Cl

Cl

Cl

H

reactants products

reactants products

H

H

Cl

Cl

Unbalanced and Balanced Equations

H

Cl

Cl

Cl

H

H

H2 + Cl2 2 HCl

(balanced)

(unbalanced)

H2 + Cl2 HCl

2

1

2

2

1

2

2

2

Meaning of Chemical Formula

Chemical

Symbol Meaning Composition

H2O One molecule

of water:

Two H atoms and one O atom

2 H2O Two molecules

of water:

Four H atoms and two O atoms

H2O2 One molecule

of hydrogen

peroxide:

Two H atoms and two O atoms