Chemical Reactions and Equations

• Chemical Reaction
  • Definition: A process in which one or more substances are converted into new substances
  • Types: Physical Change, Chemical Change
  • Examples:
    • Combustion Reactions: Burning of fuels
    • Synthesis Reactions: Formation of new compounds
    • Decomposition Reactions: Breaking down of compounds into simpler substances
• Chemical Equation
  • Definition: A symbolic representation of a chemical reaction
  • Components: Reactants, Products, Arrows (→)
  • Balancing Equations: Ensuring the law of conservation of mass is maintained
  • Types:
    • Simple Equations: One-to-one reactions
    • Complex Equations: Many-to-many reactions
• Law of Conservation of Mass
  • Statement: Matter cannot be created or destroyed in a chemical reaction
  • Importance: Helps in balancing chemical equations
• Types of Chemical Equations
  • Molecular Equations: Representing reactions in terms of molecules
  • Empirical Equations: Representing reactions in terms of simplest formula
  • Balanced Equations: Representing reactions with equal number of atoms of each element
• Writing and Balancing Equations
  • Rules:
    • Use symbols for elements
    • Use formulas for compounds
    • Use arrows for direction of reaction
    • Balance the equation by adding coefficients
  • Examples: Writing and balancing equations for various reactions