3.1.3

Stoichiometry - Formulae, Word & Symbol Equations

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Stoichiometry - Formulae, Word Equations & Symbol Equations

Stoichiometry studies the quantities of substances in chemical reactions.

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What is stoichiometry?

  • Stoichiometry uses formulae and equations to represent reactions.
  • Good stoichiometry helps predict reaction outcomes and products.
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Writing word equations

  • Word equations show reactants and products as names of substances.
  • Word equations do not show amounts or states of matter.
    • Example: Hydrogen + Oxygen → Water.
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Writing symbol equations

  • Symbol equations use chemical symbols and formulae for substances.
  • Symbol equations show the elements and compounds involved.
    • Example: H2 + O2 → H2O.
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Balancing symbol equations

  • Balancing ensures the same number of each atom on both sides.
  • Balancing follows the Law of Conservation of Mass.
  • Adjust coefficients before formula subscripts when balancing.

Jump to other topics

1States of Matter

2Atoms, Elements & Compounds

3Stoichometry

4Electrochemistry

5Chemical Energetics

6Chemical Reactions

7Acids, Bases & Salts

8The Periodic Table

9Metals

10Chemistry of the Environment

11Organic Chemistry

11.1Formulae, Functional Groups & Terminology

11.2Naming Organic Compounds

11.3Fuels

11.4Alkanes

11.5Alkenes

11.6Alcohols

11.7Carboxylic Acids

11.8Polymers

12Experimental Techniques & Chemical Analysis

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