Chemical Reactions and Balancing

Clues that a Chemical Reaction has occurred

• the color changes
• a solid forms (precipitate)
• bubbles form (only for aqueous solutions)
• Heat and/or a flame is produced or hear is absorbed (heat=Enthalpy)

Anatomy of Chemical Equations

Combustion- CHO method

• always reacts with oxygen O2
• combustion of a hydrocarbon always produces carbon dioxide CO2 and water H2O
• 1st Carbon
• 2nd Hydrogen
• 3rd Oxygen

Balancing Chemical Reactions

• here is a link that helps on the process of balancing equations
• here is a link for a practice quiz 
• here is a game for more practice