Chemistry Chapter 8 – Chemical Reactions South Lake High School Ms. Sanders

Chemical Reactions Reactants Products 2H₂ + O₂ 2H₂O

Chemical Reactions Indications of a Chemical Reaction: 1) Releases energy in the form of heat and light 2) Production of a gas 3) Formation of a precipitate (solid from 2 liquids) 4) Color change

Chemical Reactions

Chemical Reactions Symbols: Yield Reversible Heat Catalyst

Chemical Reactions Continue Symbols (s), (l), (g) – state of matter (aq) – aqueous (dissolved in water)

Chemical Reactions Types of Chemical Reactions Synthesis: A + X BX Decomposition: AX A + X Single Displacement: A + BX AX + B Double Displacement: AX + BY AY + BX Combustion: CᵪHᵧ + O₂ CO₂ + H₂O

Balancing Equations Need to have the same amount of atoms on both sides of the equation – law of conservation of mass # atoms of reactants = # atoms of products Use coefficients to balance the equation