A chemical equation represents a chemical
reaction. It shows what substances are used
(reactants) to create what new substances
(products).
Example :
6CO2 + 6H2O  C6H12O6 + 6O2
In this example carbon dioxide and water
react to form sugar and breathable
oxygen.
Elements are represented by…
…Chemical Symbols
(O, Ca, N, He)
Compounds are represented by...
…Chemical Formulas
(CO2, H2O)
Chemical Reactions are represented by…
…Chemical Equations
(2H + O  H2O )
In a chemical equation reactants are the
substances that are started with and the
products are what substances are produced.
The arrow in a chemical equation represents the
reaction taking place.
The arrow ALWAYS points to the products of a
chemical reaction.
6CO2 + 6H2O  C6H12O6 + 6O2
Reactants  Products
Reactants react producing products
Reactants  Products
The arrow ALWAYS
oints to the
roducts